evelynnew27 evelynnew27

20-05-2022
Physics

contestada

5.
A girl uses a 3.0 m long ramp to push her 110 kg motorbike up to a trailer, the floor of which is 1.2 m above the ground.
How much work is done on the motorbike?

Respuesta :

indrawboy indrawboy

20-05-2022

we can use 3 formula for inclined plane

W=-ΔPE

W=ΔKE

W=mg sinθ. d

let's use the third formula

sinθ = 1.2 : 3

sinθ = = 0.4

W = m.g. sinθ. d

W = 110 x 10 x 0.4 x 3

W = 1320 J

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