Work, Energy, Power (A)

HideShow resource information
  • Created by: Kotoni_
  • Created on: 08-04-16 15:40
What is the equation and definition for work done?
Force x Distance, One joule is the work done when a force of one newton moves an object one metre.
1 of 10
What is the work done in lifting a 1kg object book a height of 1m onto a shelf?
9.81J, as 9.81 (force/mg) x 1 (distance) = 9.81
2 of 10
A man walks at 0.5m/s to destination 4km away. The total force resisting his motion is 40N. What is the total work done by the man in reaching his destination?
160kJ, as 40N (force) x 4 (distance) = 160
3 of 10
What is the equation and definition of Power?
Force x (Displacement / Time), 1 watt is the rate of working of 1 Joule per 1 second.
4 of 10
A man walks at 0.5m/s to destination 4km away. The total force resisting his motion is 40N. What is the man's power?
20W, as 40N (Force) x [ 4km (Displacement) x 0.5 (Speed) ] = 20, as you have to calculate the time
5 of 10
What does the area under a force-displacement graph represent?
Work Done, as the equation for work done is force x displacement
6 of 10
A speed boats engine produces 80kW of power. When it is moving at 5m/s, Calculate the force applied by the boats propeller.
16kN, as Power = Force x Velocity, therefore 80kW = Force x 5m/s
7 of 10
A sail boat is travelling at an angle of 30 degrees at a constant force of 500N. It takes 2 minutes to travel 200m. What is the power of the wind?
722W, as Power = Work done / Time therefore, P= (200m x cos30) / 120
8 of 10
What is the unit of Energy?
Joule
9 of 10
A car's engine provides 500N of power. What is the power output of the engine when the car is moving at 8m/s?
4,000W, as P=Fv therefore, P= 500N x 8m/s
10 of 10

Other cards in this set

Card 2

Front

What is the work done in lifting a 1kg object book a height of 1m onto a shelf?

Back

9.81J, as 9.81 (force/mg) x 1 (distance) = 9.81

Card 3

Front

A man walks at 0.5m/s to destination 4km away. The total force resisting his motion is 40N. What is the total work done by the man in reaching his destination?

Back

Preview of the front of card 3

Card 4

Front

What is the equation and definition of Power?

Back

Preview of the front of card 4

Card 5

Front

A man walks at 0.5m/s to destination 4km away. The total force resisting his motion is 40N. What is the man's power?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Work, Energy, Power resources »