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# the rock’s acceleration at any time during its flight following the explosion is ______

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### Mohammed

Guys, does anyone know the answer?

get the rock’s acceleration at any time during its flight following the explosion is ______ from screen.

## Physics Final Exam Flashcards

Study with Quizlet and memorize flashcards containing terms like I drove 15 miles to the local farmer's market. Halfway back to my house I ran out of gas. What is my displacement?, The moon is 238,900 miles from the Earth. If you travel from the Earth to the moon and back, which of the following correctly describes the distance you have traveled?, Which of the following is a scalar? and more.

## Physics Final Exam

Term 1 / 247

I drove 15 miles to the local farmer's market. Halfway back to my house I ran out of gas. What is my displacement?

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Definition 1 / 247 7.5 miles

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Created by lucymdaniels

### Terms in this set (247)

I drove 15 miles to the local farmer's market. Halfway back to my house I ran out of gas. What is my displacement?

7.5 miles

The moon is 238,900 miles from the Earth. If you travel from the Earth to the moon and back, which of the following correctly describes the distance you have traveled?

477,800 miles

Which of the following is a scalar?

Distance

Diane is training for a marathon and goes to the track (400 m) to run every morning.

If Diane runs around the track 4 complete times, what is her final displacement, in meters?

0m

For which one of the following motions is the object's displacement the same as the distance that it travels?

Mr. R's lawn mower made a straight path (perfectly) across the edge of the lawn.

Which of the following objects most likely has a constant speed?

A car traveling at 65 mph on the freeway

A snail travels 15 cm north in 30 minutes. What is the speed of the snail in m/s?

Hints:

You will need to convert 15 centimeters (cm) to meters (m). Use dimensional analysis to accomplish this. 100 cm = 1 m.

You will need to convert 30 minutes into seconds (s).

Always ensure that you have the units being asked (m/s, in this case).

8.3 x 10-5 m/s

Which of the position-time graphs describes an object that is at rest?

the graph with a straight horizontal line

Which of the following objects has an average velocity of 0 m/s?

A runner makes one complete lap around the track at a constant speed.

A runner makes one complete lap around the track at a constant speed.

False

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## Free Fall Questions and Answers

Get help with your Free fall homework. Access the answers to hundreds of Free fall questions that are explained in a way that's easy for you to understand. Can't find the question you're looking for? Go ahead and submit it to our experts to be answered.

## Free Fall Questions and Answers

Get help with your Free fall homework. Access the answers to hundreds of Free fall questions that are explained in a way that's easy for you to understand. Can't find the question you're looking for? Go ahead and submit it to our experts to be answered.

## Free Fall Questions and Answers

Test your understanding with practice problems and step-by-step solutions. Browse through all study tools.

You drop a ball of mass 0.45 kg straight down from a height of 1.6 m with zero initial speed. The ball sinks into the sand while stopping. Assume the ball is in free fall. Draw a free-body diagram...

In the figure below, the two pictures of someone flipping a coin and letting it drop in a car moving at a constant speed of 30 km/h. The top picture is from the reference frame of the car. The bott...

Below are two pictures of someone flipping a coin and letting it drop in a car moving at a constant speed of 30 km/h. The top picture is from the reference frame of the car. The bottom picture is f...

Recall that the displacement of a freely falling object that started at rest scales quadratically with the time: delta(y)~ t^2. You drop a ball and find that it has fallen a distance of 5 feet afte...

An object is dropped from a height of 75.0 m above ground level. (a) Determine the distance traveled during the first second. (b) Determine the final velocity at which the object hits the ground. (...

A brick falls from a wall to the ground and it takes 5.67 s to hit the ground. How far did the brick fall?

A curious chlld stands on top of a 794 meter skyscraper and drops a coin from the top. How fast is the coin moving when it hits the ground?

A ball is dropped from the top of a building that is 20 m high. It hits the ground with a final velocity of 12 m/s. How much energy is lost to air resistance?

A boy stands on a bridge 14.5 m above the water, and he drops a water balloon on a boat of unsuspecting tourists. The boat is traveling at a constant speed of 12.7 m/s (toward the bridge), and the...

In free fall, which one of the following quantities increases with time? (a) Acceleration (b) Force (c) Velocity (d) Mass

A 60.0 g ball is dropped 100 m from rest. What speed does the ball have after it has fallen 100 m?

A baseball is hit so that its height in feet after t seconds is s(t) = -16t^2 + 44t + 4. (a) How high is the baseball after 1 second? (b) Find the maximum height of the baseball.

Assume air resistance is negligible unless otherwise stated. Suppose a rock is dropped into a dark well and using precision equipment, the time for the sound of a splash to return is measured. (a)...

A ball is thrown vertically upward with a speed of 26.0 m/s. Exactly 1.00 s later, a rock is thrown up vertically along the same path with a speed of 18.0 m/s. At what time will they strike each o...

A toy rocket of mass 1.8 kg is launched vertically upwards with an initial speed of 10 m/s from the top of a building. a) What is the net force acting on the rocket when it is 0.8 m above its launc...

A stone is dropped from a high cliff vertically. After 3.55 seconds, it hits the ground. How high is the cliff?

The terminal speed of a skydiver is 191 km/h in the spread-eagle position and 337 km/h in the nosedive position. Assuming that the diver's drag coefficient does not change from one position to the...

A ball is thrown upward from the ground with an initial speed of 16.8 m/s. At the same instant, another ball is dropped from a building that is 18 meters high. After how long will the balls be at t...

N = 82 objects are positioned vertically 12.44 feet apart. The clock starts when the first object starts falling. The second object starts falling from rest at the instant the first one falls 12.44...

A stone is thrown vertically upward with a speed of 26.0 m/s. Part A) How fast is it moving when it reaches a height of 20.7 m? Express your answer in meters per second. Part B) How much time is re...

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## Final Study Flashcards

Study Final Study flashcards. Create flashcards for FREE and quiz yourself with an interactive flipper.

## Final Study

107cards Physics Physics

A projectile launched at an angle of of 20 degrees (A) has the same range as a projectile launched with the same initial velocity at an angle of 70 degrees (B). Which of the following statements regarding their total flight time is true? c. * Projectile A has a shorter flight time than projectile B*

c. * Projectile A has a shorter flight time than projectile B*

A person standing at the edge of a cliff throws one ball straight up and another ball straight down at the same initial speed. Neglecting air resistance, the ball to hit the ground with the greater speed is the one initially thrown a. Upward b. Downward c. Neither - they land w/ the same speed

*c. Neither - they land w/ the same speed*

In order to do work on an object a. it is necessary that friction be present. b. it is necessary that friction not be present c. the object must move d. the applied force must be greater than the reaction force of the object

c. the object must move

You are throwing a ball straight up in the air. At the highest point, the ball's acceleration and velocity are? a. velocity and acceleration are zero b. velocity is nonzero but its acceleration is zero c. acceleration is nonzero but its velocity is zero d. velocity and acceleration are both zero

*c. acceleration is nonzero but its velocity is zero*

A person drops one rock from rest and it falls 100 meters down a cliff before hitting the ground. The person then throws an identical rock downward. The amount of kinetic energy gained by the rock dropped from rest is __________ that of the second rock, and the magnitude of the change in speed (between hitting the ground and its initial speed) of the rock dropped from rest is __________ that of the second rock. a. equal to, equal to b. equal to, greater than c. equal to, less than d. less than, equal to e. less than, greater than f. less than, less than

b. equal to, greater than

You hrow a rock straight up in the air at 15m/s and then catch it when it comes back down. Which is true? a. The acceleration of the rock just after it leaves your hand is equal in magnitude but in the opposite direction just before you catch it b. The acceleration is zero at the top of its flight c. The velocity of the rock just after it leaves your hand is equal in magnitude but in the opposite direction just before

c. *The velocity of the rock just after it leaves your hand is equal in magnitude but in the opposite direction just before you catch it*

Three cars (F,G,H) are moving witht he same velocity, and slam on the brakes. The most massive car is F and the least massive is H. Assuming all three cars have identical tires, for which car does friction do the most work? a. Car F b. Car G c. Car H d. Each car does the same friction work

a. Car F

A package is dropped from an airplane traveling horizontally at a constant speed. One second later a second package is dropped. friction is negligible. Which of the following is true?  a. The vertical separation between the packages will remain constant as they fall. b. The vertical separation between the packages will steadily increase as they fall c. The second package will hit the ground more than one second after the first package d. The horizontal distance between the two packages will decrease as they fall.

b. *The vertical separation between the packages will steadily increase as they fall*

Three cars (F,G,H) are moving witht he same velocity, and slam on the brakes. The most massive car is F and the least massive is H. Assuming all three cars have identical tires, which car travels the longest distance to skid to a stop? a. Car F b. Car G c. Car H d. Each car travels the same distance

d. They all travel the same distance

A projectile launched at an angle of of 20 degrees (A) has the same range as a projectile launched with the same initial velocity at an angle of 70 degrees (B). Which of the following statements regarding their total flight time is true? a. Projectile A has a longer flight time than projectile B b. Projectile A has the same flight time as projectile B c. * Projectile A has a shorter flight time than projectile B* d. Not enough information

c. * Projectile A has a shorter flight time than projectile B*

T/F The only way for the dot product of two vectors to be negative is for the angle between them to be greater than 90 degrees.

true

A net force F acts on an object. Which of the following are true. a. The object must be moving in the direction of F b. The object may be moving in any direction c. The object must be accelerating in the direction of F d. The object could be accelerating in any direction

b. *The object may be moving in any direction* c. *The object must be accelerating in the direction of F*

T/F If the dot product between two vectors is 1 then the vectors must be perpendicular.

false

Consider a person who is standing in an elevator that is accelerating downward. The magnitude of the upward normal force exerted by the elevator on the person is__________ the magnitude of the weight of the person a. Larger than b. Smaller than c. Equal to

b. *Smaller than*

You are pushing a wooden crate across the floor at a constant speed. You decide to turn the crate on end, reducing by half the surface area in contact with the floor. In the new orientation, to push the crate across the floor at the same speed the force you must apply must be about ______ as the force required before you changed the crate's orientation. a. four times as great b. twice as great c. equally as great d. half as great e. one-fourth as great

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Do you want to see answer or more ?
Mohammed 8 day ago

Guys, does anyone know the answer?