Quiz on Work, Power, and Simple Machines

What is the definition of work in physics?

• The energy required to lift an object

• The speed of an object

• The total energy in a system

• A force acting through a distance

Tags

NGSS.MS-PS3-5

What unit is used to measure work?

• Watt (W)

• Newton (N)

• Joule (J)

• Kilowatt (kW)

What is the formula for calculating work?

• W = F / D

• W = F + D

• W = F - D

• W = F x D

What is power defined as?

• The distance moved by an object

• The total energy used

• The rate at which work is done

• The force applied to an object

Tags

NGSS.HS-PS2-1

What is the efficiency of a machine?

• The ratio of output work to input work

• The total work done by the machine

• The speed of the machine

• The amount of energy wasted

Which of the following is NOT a type of simple machine?

• Compound Machine

• Pulley

• Inclined Plane

• Lever

What does a wedge do?

• Lifts objects vertically

• Increases the distance moved

• Changes the direction of force

• Decreases the size of the effort force

What is the mechanical advantage of a machine?

• The speed of the machine

• The amount of work done

• The total energy consumed

• The number of times the machine multiplies the effort force

Tags

NGSS.MS-ETS1-1

What is the role of friction in machine efficiency?

• It doubles the output work

• It increases efficiency

• It has no effect on efficiency

• It decreases efficiency

What is an example of a machine that can change the direction of a force?

• Lever

• Screw

• Inclined Plane

• Wedge