Work, Potential Energy, Kinetic Energy and Power Equations

Which is the correct equation for Work? 

• W = F x D
• W = F/D
• W = F + D
• W = D - F 

Power = 

• Force x Distance 
• Distance / Time 
• Work / Time 
• Work x Distance 

The SI Unit for Power is 

• Joules
• Newton
• Watt 
• Newton Meter 

The correct unit for Work is 

• Newton
• Meter
• Joules 
• Watt 

If 250 Joules of work is needed to move a box 10 meters, what force was used?

• 25 Joules
• 25 Newton
• 2,500 Joules
• 2,500 Newton

How much work can be done in 30 seconds by a 1000-watt microwave oven?

• 30,000 Watts 
• 33.3 Joules
• 30,000 Joules
• I do not know. 

Tags

NGSS.HS-PS3-3

A microwave oven does 28,000 joules of work in 20 seconds. Then the power of the microwave is

• 1400 Watt
• 560,000 Watt 
• 1400 Joules
• 560,000 Joules 

W=125 J
d=10 m
F=???

• 12.5 N
• 1250 N
• 0.08 N
• 135 N

P=25 watts 
W=5000 Joules 
t=???

• 200 sec
• 0.0005 s
• 125000 s
• 125 s

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