Chapter 2: Kinematic (set 2)

Slope of velocity time graph is:

• Acceleration

• Displacement

• Distance

• Speed

The area between the velocity-time graph is numerically equal to:

• Speed

• Displacement

• Time

• Acceleration

Which graph represents zero acceleration (constant velocity)?

• A

• B

• C

• D

When is the average velocity of an object equal to the instantaneous velocity?

• Always

• Never

• Only when the velocity is constant

• Only when the velocity is increasing at a constant rate

Suppose that an object is moving with a constant velocity. Make a statement concerning its acceleration

• The acceleration must be constantly increasing.

• The acceleration must be constantly decreasing

• The acceleration must be a constant non-zero value.

• The acceleration must be equal to zero.

Can an object's velocity change direction when its acceleration is constant? Support your answer with an example.

• No, this is not possible because it is always speeding up.

• No, this is not possible because it is always speeding up or always slowing down, but it can never turn around.

• Yes, this is possible, and a rock thrown straight up is an example

• Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example.

When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion?

• The speed of the falling object is proportional to its mass.

• The speed of the falling object is proportional to its weight.

• The speed of the falling object is inversely proportional to its surface area.

• None of the above is true

Suppose a ball is thrown downward in the absence of air resistance. Make a statement concerning its acceleration.

• Its acceleration is constantly increasing.

• Its acceleration is constant.

• Its acceleration is constantly decreasing

• Its acceleration is zero.

An object is moving with constant non-zero acceleration in the +x axis. The position versus time graph of this object is

• A horizontal straight line.

• A vertical straight line

• A straight line making an angle with the time axis.

• A parabolic curve

An object is moving with constant non-zero velocity in the +x axis. The velocity versus time graph of this object is

• A horizontal straight line.

• A vertical straight line

• A straight line making an angle with the time axis

• A parabolic curve.