Question

# QUESTION 1 1. Friction is a force acting in a ___________ direction of motion to. perpendicular...

QUESTION 1
1. Friction is a force acting in a ___________ direction of motion

to. perpendicular

b. opposite

c. to the weight of the object

d. None of the above

QUESTION 2
1. When the speed of a mobile phone doubles, what happens to its kinetic energy?

b. Doubles

c. It does not change

d. It is cut in half

QUESTION 3
1. The main difference between the kinetic energy KE and the gravitational potential energy PE is that

to. KE depends on position and PE depends on movement

b. KE depends on movement and PE depends on position

c. although both are energy that depend on movement, only the KE depends on the position

d. although both are energy depending on the position only the PE depends on the movement

QUESTION 4
1. The Uniform Circular Movement is accelerated.

to. only when it doesn't always go as fast.

b. because it changes the size of the radius during the trajectory.

c. because it changes the size of the velocity vector.

d. because it changes the direction of the velocity vector.

QUESTION 5
1. If in the laboratory simulation a centripetal force a body turns 180 revolutions 1 min. Her period is

a. 9 s

b. 18 s

c. 0.33 s

d. 1.33 s