1.

2. A ball of mass 0.2 kg is thrown vertically upwards byapplying a force by hand. If the hand moves 0.2 mwhile applying a force and the ball goes upto 2 mheight further find, the magnitude of the force.Consider g 10 m/s2

Answer»

Fs = mgh

Here h will be the sum total of distance of hand and the original distance as here both KE and PE will work,

Here h=2+0.2=2.2

So, F = mgh/s

F=0.2×10×2.2/0.2

F=10×2.2

F=22N



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