simple machine

A simple machine is a device that helps to reduce the amount of _____ required to work.

• force

• energy

• work

• power

____ is done when a force is applied over a distance.

• energy

• work

• force

• power

A fishing pole is an example of a compound machine. What simple machines are used to make up this compound machine?

• lever, wheel and axle, pulley
• wheel and axle, inclined plane, pulley
• wheel and axle, pulley, inclined plane

What type of simple machines does the photo show?

• Lever and wedge
• Inclined Plane and lever
• Pulley and wedge
• Lever and screw

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Two examples of a pulley...

• knife & axe blade
• lightbulb & screw
• flagpole hoist & window blinds
• catapult & teeter totter

The table shows the force applied and displacement when different boxes are being pushed. Which box shows the most work being done? 

• W
• X
• Y
• Z

if you push a cart with a force of 60 N for 2 m... how much work have you done

• 120 J

• 30 J

• 120 N

• 30 N

Two people shove on a wall with 100 N. The wall doesn’t move. How much work is done?

• 100J

• 100N

• 0J

• 0N

Which of the following is the best example of work being done. 

• doing homework
• lifting a box
• pushing a stationary box
• holding a box

Tags

NGSS.MS-PS3-5

Ahmed is out with his friends. Misfortune occurs and Ahmed and his friends find themselves getting a workout. They apply a cumulative force of 1000 N to push the car 200 m out of the sand. Determine the work done on the car.

• 2 x 10⁵ J

• 2.70 x 10⁴ J

• 3.2 x 10^-4 J

• 3.54 x 10⁵ J

Tags

CCSS.7.EE.B.3