Physics 121 General Physics
Concept Quizzes
Chapter 2. Motion in One Dimension

If a particle has a constant velocity, must it have a constant speed?

	Yes
	No

If a particle has a constant speed, must it have a constant velocity?

	Yes.
	No.

A car is moving along a straight road. It is initially at town A and some time later it is at town B. When it arrives at B the magnitude of its displacement from A is

	always equal to the distance it traveled.
	always less than the distance it traveled.
	always less than or equal to the distance it traveled.

A car is initially moving in reverse. The driver applies the brakes, slowing the car. What is the direction of the car's acceleration? (+x points toward the front of the car.)

	+x direction.
	-x direction.
	It depends, it could be either the +x or -x direction.

An alien space traveller exploring the earth records that his phasor pistol, dropped from a high cliff, fell a distance of 1 glong in a time of 1 tock. How far will it fall in 2 tocks? (Ignore air resistance.)

	1.5 glongs
	2 glongs
	3 glongs
	4 glongs

At any moment the slope of the velocity vs time graph of a body moving in a straight line is its

	speed.
	displacement.
	distance travelled.
	none of the above.

A ball is thrown vertically upward. (Ignore air resistance.) At what point during its flight is its acceleration zero?

	On the way up.
	At the top.
	Just before it hits the ground.
	Never.

The position verses time graph below represents the motion of an object.

Which one of the four graphs below best represents the velocity verses time graph for this object?