Question 1

A stone is thrown with an initial upward velocity of 7.0 m/s and experiences negligible air resistance.If we take upward as the positive direction,what is the velocity of the stone after 0.50 s?

Accepted Answer

A) 2.1 m/s 
B) 4.9 m/s 
C) -2.1 m/s 
D) -4.9 m/s 
E) 0.00 m/s

Question 2

A runner ran the marathon (approximately 42.0 km)in 2 hours and 57 min.What was the average speed of the runner in m/s?

Accepted Answer

A) 14,200 m/s 
B) 124 m/s 
C) 3.95 m/s 
D) 14.2 m/s

Question 3

A train starts from rest and accelerates uniformly until it has traveled 2.1 km and acquired a forward velocity of 24 m/s. The train then moves at a constant velocity of 24 m/s.  For 400 s.The train then slows down uniformly at 0.065m/s2. Until it is brought to a halt.The distance traveled by the train while slowing down is closest to

Accepted Answer

A) 4.4 km. 
B) 4.2 km. 
C) 4.0 km. 
D) 3.8 km. 
E) 3.6 km.

Question 4

A car is moving with a speed of 32.0 m/s.The driver sees an accident ahead and slams on the brakes,causing the car to slow down with a uniform acceleration of magnitude 3.50 m/s2.How far does the car travel after the driver put on the brakes until it comes to a stop?

Accepted Answer

A) 4.57 m 
B) 9.14 m 
C) 112 m 
D) 146 m 
E) 292 m

Question 5

A toy rocket is launched vertically from ground level at time t = 0 s.The rocket engine provides constant upward acceleration during the burn phase.At the instant of engine burnout,the rocket has risen to 49.0 m and acquired an upward velocity of 60.0 m/s. The rocket continues to rise with insignificant air resistance in unpowered flight,reaches maximum height,and falls back to the ground.The maximum height reached by the rocket is closest to

Accepted Answer

A) 233 m. 
B) 221 m. 
C) 209 m. 
D) 244 m. 
E) 256 m.

Question 6

From the edge of a roof top you toss a green ball upwards with initial speed v0 and a blue ball downwards with the same initial speed.Air resistance is negligible.When they reach the ground below

Accepted Answer

A) the green ball will be moving faster than the blue ball. 
B) the blue ball will be moving faster than the green ball. 
C) the two balls will have the same speed.

Question 7

Starting from rest,a dragster travels a straight 1/4 mi racetrack in 6.70 s with constant acceleration.What is its velocity when it crosses the finish line?

Accepted Answer

A) 269 mi/h 
B) 188 mi/h 
C) 296 mi/h 
D) 135 mi/h

Question 8

A car starts from rest and accelerates at a steady 6.00 m/s2.How far does it travel in the first 3.00 s?

Accepted Answer

A) 9.00 m 
B) 18.0 m 
C) 27.0 m 
D) 36.0 m 
E) 54.0 m

Question 9

To determine the height of a bridge above the water,a person drops a stone and measures the time it takes for it to hit the water.If the time is 2.3 s,what is the height of the bridge? Neglect air resistance.

Accepted Answer

A) 10 m 
B) 14 m 
C) 26 m 
D) 32 m 
E) 52 m

Question 10

A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m.She completes one lap in 100 seconds.What is her average speed?

Accepted Answer

A) 2.5 m/s 
B) 5.0 m/s 
C) 10 m/s 
D) 0 m/s 
E) 1.3 m/s

Question 11

An airplane increases its speed at the average rate of 15 m/s2.How much time does it take to increase its speed from 100 m/s to 160 m/s?

Accepted Answer

A) 17 s 
B) 0.058 s 
C) 4.0 s 
D) 0.25 s

Question 12

An astronaut stands by the rim of a crater on the Moon,where the acceleration of gravity is 1.62 m/s2 and there is no air.To determine the depth of the crater,she drops a rock and measures the time it takes for it to hit the bottom.If the time is 6.3 s,what is the depth of the crater?

Accepted Answer

A) 10 m 
B) 14 m 
C) 26 m 
D) 32 m 
E) 38 m

Question 13

A train starts from rest and accelerates uniformly until it has traveled 5.6 km and acquired a forward velocity of 42 m/s. The train then moves at a constant velocity of 42 m/s.  For 420 s.The train then slows down uniformly at 0.065 m/s2.  Until it is brought to a halt.The acceleration during the first 5.6 km of travel is closest to which of the following?

Accepted Answer

A) 0.16 m/  
B) 0.14 m/  
C) 0.17 m/  
D) 0.19 m/  
E) 0.20 m/

Question 14

Which of the following graphs represent an object at rest? (There could be more than one correct choice. )

Accepted Answer

A) graph a 
B) graph b 
C) graph c 
D) graph d 
E) graph e

Question 15

Car A is traveling at 22.0 m/s and car B at 29.0 m/s.Car A is 300 m behind car B when the driver of car A accelerates his car with a uniform forward acceleration of 2.40 m/s2. How long after car A begins to accelerate does it take car A to overtake car B?

Accepted Answer

A) 5.50 s 
B) 12.6 s 
C) 19.0 s 
D) 316 s 
E) Car A never overtakes car B.

Question 16

Car A is traveling at twice the speed of car B.They both hit the brakes at the same time and decrease their velocities at the same rate.If car B travels a distance D before stopping,how far does car A travel before stopping?

Accepted Answer

A) 4D 
B) 2D 
C) D 
D) D/2 
E) D/4

Question 17

Suppose that an object is moving with a constant velocity.Which statement concerning its acceleration must be correct?

Accepted Answer

A) The acceleration is constantly increasing. 
B) The acceleration is constantly decreasing. 
C) The acceleration is a constant non-zero value. 
D) The acceleration is equal to zero.

Question 18

Suppose that an object travels from one point in space to another.Make a comparison between the magnitude of the displacement and the distance traveled by this object.

Accepted Answer

A) The displacement is either greater than or equal to the distance traveled. 
B) The displacement is always equal to the distance traveled. 
C) The displacement is either less than or equal to the distance traveled. 
D) The displacement can be either greater than,smaller than,or equal to the distance traveled.

Exam 2: One-Dimensional Kinematics

A stone is thrown with an initial upward velocity of 7.0 m/s and experiences negligible air resistance.If we take upward as the positive direction,what is the velocity of the stone after 0.50 s?

A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min.What was the average speed of the runner in m/s?

A car is moving with a speed of 32.0 m/s.The driver sees an accident ahead and slams on the brakes,causing the car to slow down with a uniform acceleration of magnitude 3.50 m/s².How far does the car travel after the driver put on the brakes until it comes to a stop?

From the edge of a roof top you toss a green ball upwards with initial speed v₀ and a blue ball downwards with the same initial speed.Air resistance is negligible.When they reach the ground below

Starting from rest,a dragster travels a straight 1/4 mi racetrack in 6.70 s with constant acceleration.What is its velocity when it crosses the finish line?

A car starts from rest and accelerates at a steady 6.00 m/s².How far does it travel in the first 3.00 s?

To determine the height of a bridge above the water,a person drops a stone and measures the time it takes for it to hit the water.If the time is 2.3 s,what is the height of the bridge? Neglect air resistance.

A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m.She completes one lap in 100 seconds.What is her average speed?

An airplane increases its speed at the average rate of 15 m/s².How much time does it take to increase its speed from 100 m/s to 160 m/s?

An astronaut stands by the rim of a crater on the Moon,where the acceleration of gravity is 1.62 m/s² and there is no air.To determine the depth of the crater,she drops a rock and measures the time it takes for it to hit the bottom.If the time is 6.3 s,what is the depth of the crater?

Which of the following graphs represent an object at rest? (There could be more than one correct choice. )

Car A is traveling at 22.0 m/s and car B at 29.0 m/s.Car A is 300 m behind car B when the driver of car A accelerates his car with a uniform forward acceleration of 2.40 m/s². How long after car A begins to accelerate does it take car A to overtake car B?

Car A is traveling at twice the speed of car B.They both hit the brakes at the same time and decrease their velocities at the same rate.If car B travels a distance D before stopping,how far does car A travel before stopping?

Suppose that an object is moving with a constant velocity.Which statement concerning its acceleration must be correct?

Suppose that an object travels from one point in space to another.Make a comparison between the magnitude of the displacement and the distance traveled by this object.