How much work is done on a bookshelf being pulled 5.00m at an angle of 37.0 degrees from the horizontal? The magnitude of the component of the force that does the work is 43.0N

Answer 1

Hi Julie,

To make an object to move, an external force need to be applied. The force/energy what you put on the object is converted in to some other form of the energy. In this case, the force that you apply is transformed into 'motion'. (neglecting friction/loss).

Work done = Force x Distance moved
Work done = 43 Cos37 x 5
Work done = 171.7N-m = 171.7Joules

Note: Here, I have considered horizantal component of force, because work is done in the direction of motion.

Hope this makes sense.

Thanks,
Jnanesha

Jnanesha.ks
at
quest-global
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