Question 1

A vertical vector of 3 units combined with a horizontal vector of 4 units has a resultant of

Accepted Answer

A) 1 unit. 
B) 5 units. 
C) 7 units. 
A) 1 unit. 
B) 5 units. 
C) 7 units.

Question 2

The normal force that acts on a block of ice that slides on a ramp

Accepted Answer

A) is equal to mg at all angles. 
B) decreases as the slope of the ramp increases. 
C) becomes greatest when the ramp is vertical. 
A) is equal to mg at all angles. 
B) decreases as the slope of the ramp increases. 
C) becomes greatest when the ramp is vertical.

Question 3

An airplane travels at 141 km/h toward the northeast. What is its component of velocity due north?

Accepted Answer

A) 41 km/h 
B) 100 km/h 
C) 110 km/h 
D) 141 km/h 
A) 41 km/h 
B) 100 km/h 
C) 110 km/h 
D) 141 km/h

Question 4

The force exerted on the tires of a car that directly accelerate it along a road is exerted by the

Accepted Answer

A) engine. 
B) tires. 
C) air. 
D) road. 
E) none of the above 
A) engine. 
B) tires. 
C) air. 
D) road. 
E) none of the above

Question 5

When a karate chop breaks a board with a 3000-N blow, the amount of force that acts on the hand is

Accepted Answer

A) zero. 
B) 1500 N. 
C) 3000 N. 
D) 6000 N. 
A) zero. 
B) 1500 N. 
C) 3000 N. 
D) 6000 N.

Question 6

The emphasis of the orange-and-apple sequence in your textbook is

Accepted Answer

A) defining systems. 
B) actions equal reactions. 
C) forces produce accelerations. 
D) friction is a force. 
E) mass is not a force. 
A) defining systems. 
B) actions equal reactions. 
C) forces produce accelerations. 
D) friction is a force. 
E) mass is not a force.

Question 7

You stand on your skateboard and exert a 50-N push on the wall next to you. If your mass is 60 kg you'll momentarily accelerate from the wall at about

Accepted Answer

A) 0.08 m/s2. 
B) 0.8 m/s2. 
C) 8.0 m/s2. 
D) none of the above 
A) 0.08 m/s2. 
B) 0.8 m/s2. 
C) 8.0 m/s2. 
D) none of the above

Question 8

A pair of toy freight cars, one twice the mass of the other, fly apart when a compressed spring that joins them is released. Acceleration will be greater for the

Accepted Answer

A) heavier car. 
B) lighter car. 
C) same on each. 
A) heavier car. 
B) lighter car. 
C) same on each.

Question 9

Three kids pull on a toy. Kim pulls with a force of 30 N north, Jim pulls with a force of 30 N south, and Tim pulls with a force of 15 N east. The acceleration of the toy is

Accepted Answer

A) 10 m/s2. 
B) 15 m/s2. 
C) 33 m/s2 
D) need more information 
A) 10 m/s2. 
B) 15 m/s2. 
C) 33 m/s2 
D) need more information

Question 10

A player catches a ball. If action is the force of the ball against the player's glove, reaction is the

Accepted Answer

A) player's grip on the glove. 
B) glove against the ball. 
C) friction of the ground against the player's shoes. 
D) muscular effort in the player's arms. 
E) none of the above 
A) player's grip on the glove. 
B) glove against the ball. 
C) friction of the ground against the player's shoes. 
D) muscular effort in the player's arms. 
E) none of the above

Question 11

When a rocket forces exhaust gases downward, the exhaust gases

Accepted Answer

A) as the name implies, soon exhaust their influence. 
B) play no further role in the motion of the rocket. 
C) exert an upward force on the rocket. 
A) as the name implies, soon exhaust their influence. 
B) play no further role in the motion of the rocket. 
C) exert an upward force on the rocket.

Exam 5: Newtons Third Law of Motion: Action and Reaction

A vertical vector of 3 units combined with a horizontal vector of 4 units has a resultant of

The normal force that acts on a block of ice that slides on a ramp

An airplane travels at 141 km/h toward the northeast. What is its component of velocity due north?

The force exerted on the tires of a car that directly accelerate it along a road is exerted by the

When a karate chop breaks a board with a 3000-N blow, the amount of force that acts on the hand is

The emphasis of the orange-and-apple sequence in your textbook is

You stand on your skateboard and exert a 50-N push on the wall next to you. If your mass is 60 kg you'll momentarily accelerate from the wall at about

A pair of toy freight cars, one twice the mass of the other, fly apart when a compressed spring that joins them is released. Acceleration will be greater for the

Three kids pull on a toy. Kim pulls with a force of 30 N north, Jim pulls with a force of 30 N south, and Tim pulls with a force of 15 N east. The acceleration of the toy is

A player catches a ball. If action is the force of the ball against the player's glove, reaction is the

When a rocket forces exhaust gases downward, the exhaust gases

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