Question

Ivan exerts 20 N of force to lift a basket 2 m. He then carries the basket 5 m across a room to place it on a shelf. Ivan does work when he . The amount of work he does is .

Answer 1

A) Ivan does work when he lifts the basket

B) Work = Force * displacement
W = 20 * 2
W = 40 Joules

So, The Amount of work he does is 40 Joules

Hope this helps!

Answer 2

Explanation :

It is given that,

Force acting on Ivan,
`F=20\ N`

Height of the basket above the ground, s = 2 m

Work done in this case would be :

`W=Fs\ cos\theta`

Where

`\theta` is the angle between the force and the displacement and it is equal to 0.

So,
`W=20\ N* 2\ m`

`W=40\ J`

Ivan does work when he lifts the basket and it is equal to 40 J.

When he carries the basket 5 m across a room to place it on a shelf, then his weight is acting vertically downwards. The angle between the force and the displacement is now 90.

So, the work done he does is 0.