Physical Science 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 have done the same amount of work as someone, but in less time

• You are more powerful

• You are less powerful

• You have the same power

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power?

• Person A

• Person B

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

• 15 J

• 45 J

• 0 J

• 5 J

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

• 1,224 J

• 0.264 J

• 3.77 J

• 12.24 J

Tags

NGSS.HS-PS3-1

If 68 Joules was necessary to move a 4 Newton crate, how far was the crate moved?

• 272 m

• 17 m

• 4.05 m

• 272 cm 

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The unit used to measure power is the 

• Watt

• Newton

• Joule

• Newton*meter

Which of the following is a true statement about work?

• It measures how quickly an object accelerates 

• It measures how much effort is applied over a certain distance

• It measures the change in an object's rate of speed

• It measures how much time it takes to move a massive object

Tags

NGSS.MS-PS3-5

one newton exerted over a distance of one meter equals __________

• One watt

• One hertz

• One volt 

• One joule 

Tags

NGSS.MS-PS2-2

A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 

• 77 J

• 7.7 J 

• 0.7 J 

• 770 J 

Tags

NGSS.MS-PS2-2