0914 1D Motion Test Review

A car is travelling along a straight road as shown in the graph below. The car experiences no acceleration. Which of the following best describes the car’s velocity?

• Velocity is decreasing

• Velocity is increasing

• Velocity is zero

• Velocity is constant

The rate at which distance changes is known as

• gravity

• displacement

• speed

• acceleration

If an object is changing direction but maintaining a constant speed, it is

• accelerating

• falling

• stopping

• speeding

When you are driving and look at the speedometer to check how fast you are going, you are checking your

• instantaneous speed

• average speed

• velocity

• acceleration

If air resistance is negligible, (‘negligible’ means it’s so small it has NO effect), which of the following objects will fall faster on Earth?

• all objects fall at the same rate

• a baseball

• a feather

• a bowling ball

An object is dropped from rest. The initial speed of the object at the beginning of the trip is

• 0 m/s

• 49 m/s

• -9.8 m/s

• -49 m/s

Calculate the final velocity of an object, dropped from rest after 5 seconds pass if air resistance is negligible.

• 5 m/s

• -49 m/s

• -9.8 m/s

• 0 m/s

An object that is falling freely toward earth has a constant ____.

• velocity

• acceleration

• distance

• speed

What is the acceleration due to gravity on earth if air resistance is negligible?

• -9.8 m/s/s

• 32 m/s/s

• 0 m/s/s

• + 1.6 m/s/s

A car is moving in the forward direction and applies the brakes. If forward is considered to be a positive direction, then which of the following is true?

• velocity and acceleration are both positive

• velocity and acceleration are both negative

• velocity is negative and acceleration is positive

• velocity is positive and acceleration is negative