3.4 Mastery Check

Work is measured in ________.

• pascals
• newtons
• watts
• joules

Tags

NGSS.HS-PS2-1

Power is measured in ________.

• joules

• amps
• volts
• watts

How would you set up this problem:

A force of 85 N is used to push a box along the floor a distance of 15 m. How much work was done?

Tags

NGSS.HS-PS3-2

150J of work was done to life a crate with a force of 20 N. How far was the crate lifted?

• 7.5 meters
• 5 meters
• 10 meters
• 12.5 meters

What is the set up for the following problem:

How much power is used if a force of 90N is used to push a box a distance of 30m in 10s?

Tags

NGSS.HS-PS3-1

What do you have to do first to solve this problem:

A go-cart and rider have a mass of 100kg. If the cart accelerates at 5m/s² during a 25m sprint, how much work did the cart do?

• I have no idea.

• You have to find the force first by multiplying the mass of 100kg and the acceleration of 5m/s².

• You use the work formula W=Fd.

• You find the acceleration by subtracting 0m/s from 5m/s.

Tags

NGSS.HS-PS2-1

A 10kg rock falls from a height of 18m and lands on a guy about 3s later. How much power did it hit him with?

• 300 Watts
• 450 Watts
• 720 Watts
• 588 Watts

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4