Answer for Work and Energy Worksheet No. 10

10. A girl pushes her little brother on his sled with a force of 300 N for 750. m.  How much 

work is this if the force of friction acting on the sled is 

(a) 200 N, 

(b) 300 N?

(a). W = F x D

W = (300 - 200) x 750

W = 100 x 750

W = 75000J

(b). W = F x D

W = (300 - 300) x 750

W = 0 x 750

W = 0. It the sled doesn't move

Answer for Work and Energy Worksheet No. 8

8. Carlos does a chin-up and raises himself 0.8 m.  If Carlos has a mass of 62 

kg, how much work does he accomplish?  

W = F x D

W = 62KG x 0.8

W = 620N x 0.8

W = 496

Answer for Work and Energy Worksheet No. 6

6. What is the weight of a mass of 100 kg? Find the work done in raising a mass of 100 kg 
through a vertical height of 60 m.

W = F x D
W = 100KG x 60
W = 1000 x 60
W = 60000

100 kg ball

Answer for Work and Energy Worksheet No.4

4. A husky dog does 20 kJ of work as he pulls a sleigh with a force of 340 N. Through what 
distance does he pull it?

Work = F x D

20kj = 340n x D

20000 = 340n x D

20000/340 = D

D = 58.8

Answer for Work and Energy Worksheet No.2

2.A tugboat pulls a ship with a constant force of 5000 N, causing the ship to move through 
a harbor. How much work does the tugboat do on the ship if each moves a distance of 3 
km?
  
W = F x D

     W = 5000N x 3km

     W = 5000N x 3000m

     W = 15000000 J

Work In Physics

Work in physics is basically like this, if you use force to move objects and it moves, you are doing a work. Either it is a pull or a push, if its moving you're doing a work. One of the examples is when you kick a ball. You kick it forward, and the ball move forward. But if you don't use a force to move something, there is no work, the object are at rest. Or if you use force to move something but the object is still at rest, the object doens't move, there is no work at all. Example: If you try to move a tractor or a wall, it won't move at all because you're not strong enough. Another thing that doesn't create a work is that if you push something forward but it go to another direction. The SI unit of force is J or joules.

Formula of work : W = F x D OR Work = Force Times Distance
W: work
F= Force
D= Distance  

Example: if you kick a ball with 200N with the distance of 100m, how much work done by the force acting on the object?
Work = Force x Distance
Work = 200N x 100m
Work = 20000J