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In the given situation a block, of mass 10
kg is on the ground and given initial
velocity 50 m/s. Observer-1 is at rest,
observer-2 is moving with velocity 5 m/s,
observer-3 moving with velocity 10 m/s
and observer -4 moving with velocity 15
m/s in the direction as shown in the figure.
10 kg
μ = 0.1
0 m/s
(1)
50 m/s
5 m/s
(2)
10 m/s 15 m/s
(4)
work done on block due to friction and
work done on ground due to friction as
observed by 1...???

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