Ch 2-4 Content Practice

Ch 2-4 Content Practice

Newton's Third Law

Multiple Choice

Newton’s third law of motion states that when an object exerts a force on another object, the second object exerts an equal force in the same direction.

• True

• False

Multiple Choice

The forces that two objects exert on each other are called a force pair.

• True

• False

Multiple Choice

Forces in a force pair never cancel each other.

• True

• False

Multiple Choice

The force that a hammer exerts on a nail is the reaction force.

• True

• False

Multiple Choice

If an object experiences a net unbalanced force, the object accelerates.

• True

• False

Multiple Choice

In the equation p = m × v, the letter p stands for momentum.

• True

• False

Multiple Choice

A bullet has more momentum than a moving ship.

• True

• False

Multiple Choice

In collisions, momentum is seldom conserved unless an outside force acts on the colliding objects.

• True

• False

Multiple Choice

A collision between two billiard balls is an elastic collision.

• True

• False

Multiple Choice

A force that causes objects to gain momentum is friction.

• True

• False

Multiple Choice

While driving down the road, a firefly strikes the windshield of a bus and makes a quite obvious mess in front of the face of the driver. The firefly hit the bus and the bus hits the firefly. Which of the two forces is greater: the force on the firefly or the force on the bus?

• Firefly

• Bus

• Equal Forces

Multiple Choice

If you sit in a chair, the only force acting on you is gravity

• True

• False

Multiple Choice

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

• Always True

• Never True

• Sometime True

Multiple Choice

Consider the picture shown above. Which is an action-reaction pair?

• A and C upon B, and B upon A and C

• A upon B and B upon A

• B upon C and A upon C

• A, B, and C are action-reaction forces

Multiple Choice

According to Newton's third law forces come in pairs?

• True
• False

Multiple Choice

According to Newton's Third law the strength or magnitude of forces will be...

• smaller
• equal
• larger

Multiple Choice

Newton's Third Law is also known as...

• The Law of Inertia

• The Law of Acceleration

• The Law of Conservation of Momentum (Force Pairs)

Multiple Choice

A rocket pushes exhaust 10, 000 N. Without any other forces acting on the rocket, how much force does the rocket go forward?

• 15,000 N
• 1,000 N
• 10, 000 N

Multiple Choice

A baseball player bats a ball with a force of 1,000 N. The ball exerts a reaction force (without any additional forces action on it) against the bat of...

• Less than 1, 000 N
• 1,000 N
• More than 1,000 N

Multiple Choice

Newton's Third Law States...

• Objects in motion stay in motion and objects at rest stay at rest
• Force is equal to mass times acceleration
• For each action there is an equal and opposite reaction

Multiple Choice

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

• The grip of the player's hands on the ball
• the air resistance of the ball
• the force of the ball against the bat

Multiple Choice

A player throws a ball. The action force is the player impact on the ball. The reaction force is...

• The force of the ball impact on the player
• The force of the grip of the ball
• The celebration the player is thinking of

Multiple Choice

An archer shoots an arrow. The action force is the bowstring against the arrow, the reaction force is...

• Air resistance against the bow

• the arrow's push against the bowstring

• the grip of the archer's hand on the bow