Review03

What is the physical quantity that refers to the total path length covered by an object?

• Distance

• Displacement

• Scalar

• Vector

Which of the following is a physical quantity that has a magnitude, and direction?

• scalar

• vector  

• resultant 

• frame of reference

A positively charged balloon is brought near a neutral metal sphere. While the balloon is near, the

                balloon is touched. Which of the following describes the movement of the electrons?

• Electrons move from the sphere to the balloon.

• Electrons move from the balloon into the sphere.

• Electrons move from the hand to the sphere.

• Electrons move from the sphere to the hand.

What is the speed of an object at rest?

• 65 mph

• –35 mph

• 0 mph

• objects never rest

What refers to the object's change in position?

• Distance

• Velocity

• Acceleration

• Time

What refers to the object's change in position with respect to a reference point?

• Motion

• Velocity

• Speed

• Acceleration

When sound  travels through air, the air particles ____________.

• do not vibrate

• A.    vibrate perpendicular to the direction of wave propagation

• vibrate but not in any fixed position

• vibrate along the direction of wave propagation

What is the displacement when a runner completes one lap of a 400m track?

• Zero  

• 200m 

• 400m

• Depends on the radius of the track

Which of the following is a physical quantity that has a magnitude, but no direction?

• scalar

• vector 

• resultant

• frame of reference

What quantity describes how quickly you change your velocity?

• Distance

• Speed

• Velocity

• Acceleration