CHAPTER 8 TEST Momentum

What is momentum often associated with in everyday language?

• A tendency to stop

• A tendency to change direction

• A tendency to continue on course

• A tendency to slow down

According to Newton's first law of motion, what does every object or system have?

• Velocity

• Inertia

• Acceleration

• Force

How is impulse related to force and time?

• Impulse is the product of force and time.

• Impulse is the sum of force and time.

• Impulse is the difference between force and time.

• Impulse is the ratio of force to time.

According to Newton's second law in terms of momentum, what does F_net equal?

• Δp/Δt

• ma

• mv/t

• F/m

What does the symbol Δp represent in physics?

• Change in velocity

• Change in momentum

• Change in force

• Change in mass

In the Snap Lab activity, what does hitting water with your full palm represent?

• A swimmer doing a dive

• A swimmer doing a belly flop

• A ball being thrown

• A rocket launching

In the example of a football player, what is the mass of the player used to calculate momentum?

• 0.410 kg

• 110 kg

• 25 kg

• 8 kg

In the context of elastic collisions, what does the term "frictionless surface" imply?

• No kinetic energy is lost to heat.

• Objects stick together after collision.

• The surface is rough.

• The objects are stationary.

Which of the following is true about perfectly elastic collisions?

• They occur only with subatomic particles.

• They always result in objects sticking together.

• They can happen with any everyday object.

• They involve a loss of kinetic energy.

What is the result of the addition of vectors \( \vec{a} \) and \( \vec{b} \) if their magnitudes are \( A \), \( B \), and \( R \) respectively?

• \( R_x + R_y = 0 \)

• \( A_x + A_y = \vec{A} \)

• \( R = \vec{a} + \vec{b} \)

• \( A + B = R \)