A block of mass 10 kg, moving in x direction with a constant speed of 10ms -1 , is subject to a retarding force F = 0.1 x J/m during its travel from x = 20 m to 30 m. Its final KE will be:
Text Solution
Verified by ExpertsThe correct answer is:
D
a = 
= 0.01x = 
So, 
= 4.5 – 2 = 2.5
= 10 × 2.5 J = – 25 J
= 
= 500 – 25J = 475 J
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