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16, A block of mass 20 kg kept at rest on an inclined planeof inclination 37° is pulled up the plane by applyingaconstant force of 20 N parallel to the incline. The forceacts for one second. (a) Show that the work done by theapplied force does not exceed 40 J. (b) Find the workdone by the force of gravity in that one second if thework done by the applied force is 40 J. (c) Find thekinetic energy of the block at the instant the force ceasesto act. Takeg 10 m/s. |
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