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A textbook with a weight of 20 N is lifted 0.7 meters from the ground. What is the work, in joules, needed?

A 1000 kg car is pushed with 400 N of force over 50 meters. What is the work, in joules, needed?

A student pushes a cart with 10 N of force for 20 meters. What is the work, in joules, needed?

Respuesta :

Answer:

14J

20000J

200J

Explanation:

formula :W=FS

W:work done

F:force (N)

S:displacement moved in direction of force (m)

1) 20N×0.7m

=14J

2) 400N×50m

= 20000J

3) 10N×20m

=200J

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