Question

A girl pushes a 25 kg lawn mower as shown in the figure. (Ignore friction)
If F = 30 N and the angle θ = 40°.
(i) List the three forces acting on the mower.
1) ...................... 2) The applied Force F and 3) .......................
The free body diagram is shown on the right (see figure)
(ii) Find the components of F (F x and F y)
F x = ...................................... and F y = ......................................
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(iii) Show that the acceleration of the mower is equal to a = 0.919 m /s 2
F net = m a F x – f = m a ( but given friction f = 0)
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(iv) What is the normal force N exerted on the mower by the lawn ? Answer: N = 264.28 N
[ N – W – F sin 40 = 0 , no motion along y – axis ,
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Answer 1

Explanation:

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