Physics Unit Test

What is the name of the pulley system shown?

• Fixed pulley

• Movable pulley

• Compound pulley

• Open drive pulley

• Crossed drive pulley

This 2000 N weight is raised 1 meter by pulling 4 meters of rope. What force was required to pull the rope?

• 500 N
• 1000 N
• 2000 N
• 8000 N

An effort of 450 newtons is applied to this pulley. What is the force of the load that will be lifted?

• 450

• 600

• 750

• 900

What is the mechanical advantage of this pulley system?

• 4

• 6

• 8

• 10

A force acting on an object does no work if

• A. a machine is used to move the object.

• B. the force is not in the direction of the object’s motion.

• C. the force is greater than the force of friction.

• D. the object accelerates.

What is the speed of a bobsled whose distance time graph indicates that it traveled 100 m in 25 seconds?

• A. 4 m/s

• B. 0.25 mph

• C. 250 m/s

• D. 100 m/s

What is the SI unit of pressure?

• A. a pascal

• B. a newton

• C. g/cm³

• D. m/s²

The amount of matter in an object is called its

• A. Inertia

• B. balance.

• C. Force

• D. mass.

The force that one surface exerts on another when the two rub against each other is called

• A. gravity.

• B. inertia.

• C. friction.

• D. acceleration.

An object that travels around another object in space is called a(n)

• A. satellite.

• B. inertia.

• C. projectile.

• D. mass.