Question

. Anne is pushing a wheelbarrow filled with mulch to place in her garden. She is pushing the wheelbarrow with a force of 70 N at an angle of 50° with the horizontal. How much work in joules is Anne doing when she pushes the wheelbarrow 25 meters?

Answer 1

1124.8 Joules

Explanation:

Follow the steps in the precalculus textbook p. 487 and multiple vector x by 25

Answer 2

Anne is pushing a wheelbarrow. work done by Anne is 1124.87 Joules.

Solution:

Given that Anne is pushing a wheel barrow filled with mulch to place in her garden. She is pushing the wheel barrow with a force of 70 N at an angle of
`50^(\circ)` with the horizontal.

She pushes the wheel barrow 25 meters.

Need to calculate work done.

Work done = force in the direction of moment x distance covered

So force in the direction of moment is force in the distance of horizontal that is 70cos50 newton

`\text { Work done }=70 \cos 50 * 25 \text { meters }=70 * 0.6427 * 25`

Work done = 1124.87 Joules.

Hence word done by Anne is 1124.87 Joules.