Work, Power, Energy 2

A motorcycle has mass of 200 Kg is moving with the velocity of 15 m/s. What is the kinetic energy of the motorcycle?

• 1500 J

• 3000 J

• 22500 J

• 45000 J

Tags

NGSS.MS-PS3-1

Pratik can carry 200N load and walks a distance of 100m in 50 seconds. What is the power of Pratik?

• 400 W

• 1000000 W

• 100 W

• 25 W

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

 Work done = Force x _________

• a. distance
• b. acceleration
• c. velocity
• d. speed

Tags

NGSS.MS-PS3-5

The equation for POWER is

• power = mass x time

• power = work / time

• power = time / work

• power = work x time

In which of these cases is work being done?

• A student sleeps

• A student pushes a locked door that does not move

• A student carries her chair into another room

• A student sits on the carpet

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 

A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?

• 600 J 
• 660 J
• 900 J 
• 1200 J 

Tags

NGSS.MS-PS2-4

You do 90 joules of work in 30 seconds. How much power have you generated?

• 30 watts
• 3 watts
• 120 watts
• 270 watts

Tags

NGSS.MS-PS3-4

What is needed to calculate work?

• force

• distance

• time

• mass

You move a 12-newton box up a 6-meter ramp. In order to find out how much power you created, what would you need to know?

• The mass of the box
• The slope of the ramp 
• The direction the box moved
• How long the task took