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dessy6546
14.10.2019 •
Mathematics
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?
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Ответ:
When Anne pushes the wheelbarrow 25 meters the work done is 1120 joules
Solution:
We know![\text { Work }(\mathrm{W})=\text { Force }(\mathrm{F})\times\text { Distance (D) }](/tpl/images/0317/4392/88b10.png)
Anne is pushing the wheelbarrow with a force of 70 N at an angle of
with the horizontal
So the force of Anne will be![F=70 \cos 50^{\circ}=(70 \times 0.64)=44.8 \mathrm{N}](/tpl/images/0317/4392/4e7f8.png)
She pushes the wheelbarrow 25 meter, So D = 25 meters
So, the![work,F\times D=(44.8 \times 25)=1120 \text { Joules }](/tpl/images/0317/4392/c654f.png)
Anne has done total 1120 joules work.
Ответ:
there is no screen shoot