AP Physics 1 All Units Review

A block slides to the right on a rough horizontal surface. Which of the following statements about the frictional force exerted on the block is true?

• There are only microscopic interactions.

• It doesn't depend on the materials of the block.

• 
  Gravitational interactions between the atoms in the block.

• Sum of all the microscopic contact forces between the bottom of the block and the surface.

What is the area under the curve of an acceleration vs time graph indicate?

• final velocity of an object

• initial velocity of an object

• Change in velocity

• The average velocity of an object

Which doesn't stay constant when an object is thrown off the cliff?

• x-component of velocity

• y-component of velocity

• acceleration

• net force

A box sliding down an inclined plane attains a velocity of 27 m/s in 3 seconds from rest.  Find the acceleration.

• 7km/min

• 1m/s^2

• 3km

• 9m/s^2

A car drives down an 25 degree incline at a constant speed. The force of friction keeping the car from accelerating is 500N. The weight of the car is about....

• 90000N

• 1200N

• 500N

• 700N

The net force of an object is 0 when its...

• accelerating

• in projectile motion

• moving at a constant speed of is at rest

• got a frictional force acting one it

It pool balls push off each other while playing billiard, how do their accelerations compare?

• They will accelerate in the same direction with different magnitudes depending on the mass.

• They have equal magnitudes but in the opposite directions if their masses are equal

• They cancel each other out so there is no acceleration

• The ball will accelerate faster than another

A force of 8 Newton’s is applied to a bow so that it moves at a constant velocity of 1.5 m/s. The net force is...

• 2N

• 0N

• 7N

• 800N

What is the relationship between gravitational force and gravity?

• directly proportional to m

• directly proportional to r^2

• inversely proportional to r^2.

• directly proportional to M

A ball is attached to a string that is 1.5m long. It is spun so that it completes two full rotations every second. What is the centripetal acceleration felt by the ball?

• 18m/s^2

• 78m/s^2

• 237m/s^2

• 0m/s^2