Work and Power Review

How much work is being done with 200 N of force over 426 meters?

(a)  

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

(a)  

Work is done when a weightlifter holds a barbell still above his head.

• True
• False

You push against the back of your friends car that is stuck. You push and be become very tired, but the car does not move. Did you do work?

• Yes, work was done

• No, work wasn't done

Tags

NGSS.HS-PS2-1

The amount of work done in a certain amount of time is known as 

• work
• effort force
• resistance force 
• power

If you increase your work and decrease your time, you will have

• more power

• less power

• same amount of power

• power rating can not be determined

If you perform the same work as someone else but in less time, you ...

• are more powerful

• are less powerful

• have the same power

You are holding a 30 N sack of potatoes about 0.5 m above the ground while standing in line at the grocery store. You have been waiting for 2 minutes. How much power have you produced?

• 30 Watts

• 0.125 Joules

• 0.125 Watts

• 0 Watts

The more POWER you use to move an object, the more work you do. 

• True
• False

If 68 W of power is produced in 18 seconds, how much work is done?

(a)