Question 1

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive period?

Accepted Answer

A) 18 m 
B) 20 m 
C) 40 m 
D) 80 m

Question 2

A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s2 to the right. What is the cart's displacement during the first 6.0 s of this motion?

Accepted Answer

A) 10 m 
B) 55 m 
C) 66 m 
D) 80 m

Question 3

An object is moving in a straight line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time?

Accepted Answer

A) 30 m 
B) 39 m 
C) 48 m 
D) 57 m

Question 4

Two identical objects A and B fall from rest from different heights to the ground. If object B takes twice as long as object A to reach the ground, what is the ratio of the heights from which A and B fell? Neglect air resistance.

Accepted Answer

A) hA/hB = 1/ $\sqrt { 2 }$ 
B) hA/hB = 1/2 
C) hA/hB = 1/4 
D) hA/hB = 1/8

Question 5

A car is moving with a constant acceleration. At time t = 5.0 s its velocity is 8.0 m/s in the forward direction, and at time t = 8.0 s its velocity is 12.0 m/s forward. What is the distance traveled in that interval of time?

Accepted Answer

A) 10 m 
B) 20 m 
C) 30 m 
D) 40 m 
E) 50 m

Question 6

Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3.0 m/s and Betty has a speed of 2.0 m/s. How long does it take for them to meet?

Accepted Answer

The answer of Arthur and Betty start walking toward each...

Question 7

A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?

Accepted Answer

A) 85 km/h 
B) 88 km/h 
C) 90 km/h 
D) 92 km/h

Question 8

Human reaction time is usually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it, assuming negligible air resistance?

Accepted Answer

A) At least 3.0 cm 
B) At least 4.9 cm 
C) At least 6.8 cm 
D) At least 9.8 cm

Question 9

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 10

Which of the following quantities has units of a displacement? (There could be more than one correct choice.)

Accepted Answer

A) 32 ft/s2 vertically downward 
B) 40 km southwest 
C) 9.8 m/s2 
D) -120 m/s 
E) 186,000 mi

Question 11

If you run a complete loop around an outdoor track of length 400 m in 100 s, find your
(a)average velocity and (b)average speed.

Accepted Answer

The answer of If you run a complete loop around...

Question 12

The figure shows the velocity-versus-time graph for a basketball player traveling up and down the court in a straight-line path. Find the displacement of the player
(a)during the first two seconds.
(b)between t = 4 s and t = 8 s.

Accepted Answer

The answer of The figure shows the velocity-versus-time graph for...

Question 13

If the velocity versus time graph of an object is a horizontal line, the object is

Accepted Answer

A) moving with zero acceleration. 
B) moving with constant non-zero acceleration. 
C) at rest. 
D) moving with increasing speed.

Question 14

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 $60.0 \mathrm {~m} / \mathrm { s }$ 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 15

A train starts from rest and accelerates uniformly until it has traveled 2.1 km and acquired a forward velocity of $24 \mathrm {~m} / \mathrm { s }$ The train then moves at a constant velocity of $24 \mathrm {~m} / \mathrm { s }$ for 400 s. The train then slows down uniformly at $0.065 \mathrm {~m} / \mathrm { s } ^ { 2 }$ 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 16

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and experience no significant air resistance. If the 10-kg rock reaches a maximum height h, what maximum height will the 20-kg ball reach?

Accepted Answer

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

Question 17

An object is thrown upwards with a speed of 13 m/s. How long does it take to reach a height of 4.0 m above the projection point while descending? Neglect air resistance.

Accepted Answer

A) 0.42 s 
B) 1.2 s 
C) 2.3 s 
D) 3.1 s 
E) 4.2 s

Question 18

The velocity v(t)of a particle as a function of time is given by v(t)= (2.3 m/s)+ (4.1 m/s2)t - (6.2 m/s3)t2. What is the average acceleration of the particle between t = 1.0 s and t = 2.0 s?

Accepted Answer

A) -13 m/s2 
B) -15 m/s2 
C) 13 m/s2 
D) 15 m/s2 
E) 0 m/s2

Question 19

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 20

Suppose that a car traveling to the east (+x direction)begins to slow down as it approaches a traffic light. Which statement concerning its acceleration must be correct?

Accepted Answer

A) Its acceleration is in the +x direction. 
B) Its acceleration is in the -x direction. 
C) Its acceleration is zero. 
D) Its acceleration is decreasing in magnitude as the car slows down.

Exam 2: Motion in One Dimension

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive period?

A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s² to the right. What is the cart's displacement during the first 6.0 s of this motion?

An object is moving in a straight line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time?

Two identical objects A and B fall from rest from different heights to the ground. If object B takes twice as long as object A to reach the ground, what is the ratio of the heights from which A and B fell? Neglect air resistance.

A car is moving with a constant acceleration. At time t = 5.0 s its velocity is 8.0 m/s in the forward direction, and at time t = 8.0 s its velocity is 12.0 m/s forward. What is the distance traveled in that interval of time?

Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3.0 m/s and Betty has a speed of 2.0 m/s. How long does it take for them to meet?

A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?

Human reaction time is usually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it, assuming negligible air resistance?

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?

Which of the following quantities has units of a displacement? (There could be more than one correct choice.)

If you run a complete loop around an outdoor track of length 400 m in 100 s, find your (a)average velocity and (b)average speed.

The figure shows the velocity-versus-time graph for a basketball player traveling up and down the court in a straight-line path. Find the displacement of the player (a)during the first two seconds. (b)between t = 4 s and t = 8 s.

If the velocity versus time graph of an object is a horizontal line, the object is

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v₀ and experience no significant air resistance. If the 10-kg rock reaches a maximum height h, what maximum height will the 20-kg ball reach?

An object is thrown upwards with a speed of 13 m/s. How long does it take to reach a height of 4.0 m above the projection point while descending? Neglect air resistance.

The velocity v(t) of a particle as a function of time is given by v(t) = (2.3 m/s) + (4.1 m/s²) t - (6.2 m/s³) t². What is the average acceleration of the particle between t = 1.0 s and t = 2.0 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?

Suppose that a car traveling to the east (+x direction) begins to slow down as it approaches a traffic light. Which statement concerning its acceleration must be correct?

Exam 2: Motion in One Dimension

If you are driving 72 km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive period?

A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s2 to the right. What is the cart's displacement during the first 6.0 s of this motion?

An object is moving in a straight line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time?

Two identical objects A and B fall from rest from different heights to the ground. If object B takes twice as long as object A to reach the ground, what is the ratio of the heights from which A and B fell? Neglect air resistance.

A car is moving with a constant acceleration. At time t = 5.0 s its velocity is 8.0 m/s in the forward direction, and at time t = 8.0 s its velocity is 12.0 m/s forward. What is the distance traveled in that interval of time?

Arthur and Betty start walking toward each other when they are 100 m apart. Arthur has a speed of 3.0 m/s and Betty has a speed of 2.0 m/s. How long does it take for them to meet?

A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?

Human reaction time is usually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it, assuming negligible air resistance?

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?

Which of the following quantities has units of a displacement? (There could be more than one correct choice.)

If you run a complete loop around an outdoor track of length 400 m in 100 s, find your (a)average velocity and (b)average speed.

The figure shows the velocity-versus-time graph for a basketball player traveling up and down the court in a straight-line path. Find the displacement of the player (a)during the first two seconds. (b)between t = 4 s and t = 8 s.

If the velocity versus time graph of an object is a horizontal line, the object is

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and experience no significant air resistance. If the 10-kg rock reaches a maximum height h, what maximum height will the 20-kg ball reach?

An object is thrown upwards with a speed of 13 m/s. How long does it take to reach a height of 4.0 m above the projection point while descending? Neglect air resistance.

The velocity v(t) of a particle as a function of time is given by v(t) = (2.3 m/s) + (4.1 m/s2) t - (6.2 m/s3) t2. What is the average acceleration of the particle between t = 1.0 s and t = 2.0 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?

Suppose that a car traveling to the east (+x direction) begins to slow down as it approaches a traffic light. Which statement concerning its acceleration must be correct?

A cart with an initial velocity of 5.0 m/s to the right experiences a constant acceleration of 2.0 m/s² to the right. What is the cart's displacement during the first 6.0 s of this motion?

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v₀ and experience no significant air resistance. If the 10-kg rock reaches a maximum height h, what maximum height will the 20-kg ball reach?

The velocity v(t) of a particle as a function of time is given by v(t) = (2.3 m/s) + (4.1 m/s²) t - (6.2 m/s³) t². What is the average acceleration of the particle between t = 1.0 s and t = 2.0 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?