Work Power and Simple Machines

The brakes of a car exert a frictional force of 6000 N in getting the car to stop. If the work done by the brakes is 120,000 J in coming to a stop, how many meters id the car travel after the driver applied the brakes?

• 6 m

• 20 m

• 12 m

• 40 m

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

A ____________ machine uses a combination of two or more simple machines.

This is the SI unit for power.

• watt

• horsepower

• watt and/or horsepower

• joule

What's the symbol for mechanical advantage?

• MA

• M

• Ma

• eff

Which of the following is the symbol for ideal mechanical advantage?

• IMA

• AMA

• MAi

• Mima

Which of the following is the symbol for actual mechanical advantage?

• AMA

• Ama

• Mama

• MA

What's the symbol for work?

• W

• w

• P

• p

Tags

NGSS.MS-PS3-5

Identify the type of simple machine shown.

• wheel and axle

• pulley

• wedge

• screw

What is the Ideal Mechanical Advantage of the pulley shown. (Count the supporting ropes.)

• 1

• 2

• 3

• 4

What is the Ideal Mechanical Advantage of the pulley shown. (Count the supporting ropes.)

• 1

• 2

• 3

• 4