Ch07 Quiz

Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in the opposite direction to that of the first object.

• Sometimes true
• Always true
• Always false

A high school student hits a nail with a hammer. During the collision, there is a force

• on the nail but not on the hammer.
• on the nail and also on the hammer.
• on the hammer but not on the nail.

Forces always occur

• as single quantities.
• by themselves.
• in pairs.
• in triplets.

An archer shoots an arrow. Consider the action force to be the bowstring against the arrow. The reaction to this force is the

• arrow's push against the bowstring.
• weight of the arrow.
• friction of the ground against the archer's feet.
• air resistance against the bow.
• grip of the archer's hand on the bow.

A player catches a ball. Consider the action force to be the impact of the ball against the player's glove. What is the reaction to this force?

• The muscular effort in the player's arms
• The force the glove exerts on the ball
• Friction of the ground against the player's shoes
• The player's grip on the glove
• none of the above

A player hits a ball with a bat. The action force is the impact of the bat against the ball. What is the reaction to this force?

• The force of the ball against the bat
• The weight of the ball
• Air resistance on the ball
• The grip of the player's hand against the bat
• none of the above

As a ball falls, the action force is the pull of Earth's mass on the ball. What is the reaction to this force?

• The pull of the ball's mass on Earth
• The acceleration of the ball
• Nonexistent in this case
• Air resistance acting against the ball
• none of the above

A person is attracted towards the center of Earth by a 440-N gravitational force. The force with which Earth is attracted toward the person is

• 440 N.
• very very small.
• very very large.

An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is

• larger.
• the same.
• smaller.
• Need more information to say

An unfortunate bug splatters against the windshield of a moving car. Compared to the deceleration of the car, the deceleration of the bug is

• larger.
• the same.
• smaller.