Physics SY20-21 Adv III

What is the formula for calculating potential energy?

• (work)/(time)

• (distance)/(time)

• (mass)(velocity)

• (mass)(gravity)(height)

• (mass)(acceleration)

Determine the momentum of a 100 kg professional fullback running across the line a 5m/s, northward

• 500 kg*m/s, North

• 20 kg*m/s, North

• 500 kg*m/s

• 20 kg*m/s

• None of the above

A hockey player applies an average force of 80N to a 0.25kg hockey puck for a time of 0.15s. Determine the impulse experienced by the hockey puck.

• 3 N*s

• 12 N*s

• 533 N*s

• 2,133 N*s

What variables determine an object's impulse? (Select all that apply)

• force

• mass

• time

• velocity

Which of the following is a measure of velocity?

• 30s

• 30 m, South

• 30 m/s

• 30 m/s, South

These are examples of vector quantities

• Acceleration and Time

• Velocity and Acceleration

• Speed and Velocity

• Distance and Displacement

Explain the relationships between Newton's second law (Force) with regard to momentum and impulse. Use mathematic relationships in explanation.

A 4-kg box falls from a 10 m platform. What is its approximate KE before colliding with the ground?

• 200 J

• 300 J

• 400 J

• 500 J

The rate of change on position-time graph determines which of the following

• Acceleration

• Velocity

• Force

• Impulse

Imagine that a car traveling at 100 m/s must slam on the brakes to avoid hitting a raccoon. If

it takes 4 seconds for the car to slow down to a stop, what is its acceleration (m/s2

)?

• 25 m/s^2

• - 25 m/s^2

• 2.5 m/s^2

• -2.5 m/s^2