Physics A Test

A rock is thrown vertivally into the air. The acceleration of the rock at its highest point is:

-9.8 m/s ^2

What is the displacement of the bus during this trip?

0 km

What total distance does the bus travel during this trip?

60 km

During which segment does the speed remain constant?

During segment B

During which segment does the object travel the further?

During segment C

During which segment is the bus moving with the greates positive velocity?

During segment C

Which of the following describes the motion of an object whose velocity is positive and whose accleration is negative?

The object is slowing down

You drop a rock off a bridge. What the rock has fallen 4 m, you drop a second rock. As the two rocks continue to fall, what happens to their separation?

The separation increases as they fall.

Which of the following statements is correct for an object released from rest?

The velocity changes by 9.8 m/s every second.

According to Galileo's Law of Falling Bodies

all objects fall to the Earth at a constant acceleration rate, regardless of their mass.

You drop a rock off a bridge. When the rock has fallen 4m, you drop a second rock. As the two rocks continue to fall, what happens to their velocities?

both increase at the same rate.

Which term is used when describing an object's change in position?

displacement

During which segement(s) is the acceleration rate the greatest?

during segment C

Which term is used when describing an object's location to some reference point?

position

Acceleration refers to the rate that an objects _______ changes.

velocity