Unit 1 Review Missed Qs

What motion is represented by the speed-time graph?

• Travelling at constant speed, then decelerating.

• Accelerating, then decelerating.

• Accelerating, then travelling at constant speed.

• Traveling at constant speed, then stopping

The graph below represents

• Speed
• Velocity
• Acceleration
• Deceleration

The slope of a velocity vs time graph is known as:

• acceleration

• velocity

• average speed

• displacement

While taking off from an aircraft carrier, a jet starting from rest accelerates uniformly to a final speed of 40. meters per second on a runway that is 70. meters long. What is the magnitude of the acceleration of the jet?

• 1.8 m/s²

• 11 m/s²

• 0.57 m/s²

• 0.29 m/s²

A displacement vector with a magnitude of 20. meters could have perpendicular components with magnitudes of

• 12 m and 16 m

• 10. m and 10. m

• 12 m and 8.0 m

• 16 m and 8.0 m

A dog running with an initial speed of 7.5 m/s comes to a stop in 5 seconds. What is the dog's displacement?

• 0 m

• 7.5 m

• 37.5 m

• 18.8 m

A ball is thrown straight up into the air at 20.0 m/s. What is its velocity as it returns to its initial height?

• 0 m/s

• -9.81 m/s

• 20 m/s

• -20 m/s

What is the displacement of a ball that is thrown straight up to a height of 20 m, and then falls back to its initial height?

• 0 m

• 20 m

• 40 m

• -20 m

What happens to the velocity of a ball as it is dropped off a cliff (assuming no air resistance)?

• It decreases at a uniform rate

• It increases at a uniform rate

• It is constant

• It increases at a non-uniform rate

Which scenario or scenarios demonstrate acceleration? (Mark all that apply)

• A bicycle skidding to a stop

• A runner taking off from a stop.

• A car taking a corner at a constant speed.

• none of these