Work and Simple Machines

What simple machine has a wheel with a groove on it that keeps a rope in place?

• Pulley

• Lever

• Screw

• Wedge

Which simple machine doesn't move and a heavy object can be rolled or pushed up this machine?

• Wheel and axle

• Inclined plane

• Wedge

• Screw

What simple machine holds things together?

• Wedge

• Screw

• Lever

• Pulley

What is the fixed point where a lever turns or pivots?

• Load

• Work

• Fulcrum

• Screw

What is anything that makes work easier called?

• Energy

• Force

• Work

• Machine

A machine with few or no moving parts is called a ______.

• Machine

• Compound machine

• Simple machine

• Work

What simple machine can be used to split things apart and also it can hold open a door?

• Lever

• Pulley

• Wedge

• Screw

You move an 8 N weight five meters in 4 seconds. How much power have you generated?

• 160 watts

• 6.4 watts

• 10 watts

• 17 watts

A kid applies a force of 70N to a ball over 1.1 meters. How much work did he do on the ball?

• 7.7 J

• 770 J

• 77 J

• 0.7 J

You move a 12 N box up a 6 meter ramp. In order to find out how much power you created, what do you need to know?

• The slope of the ramp

• The direction the box moved

• How long the task took

• The mass of the box