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Q5 pls....here we have to find work done by friction right? Please tell me the solution...........

Q5 pls....here we have to find work done by friction right? Please tell me the solution...........

Question Image
Grade:11

1 Answers

Shaswata Biswas
132 Points
4 years ago
Mass of the body, m = 4 kg, velocity, v = 5 m/s, time, t = 10 s
then, displacement, S = v.t = 5×10 = 50 m
And, coefficient of friction, \mu = 0.4
Then, friction, f = \mu mg = 0.4×4×9.8 = 15.68 N
So, work done by the friction, W = f.S = 15.68×50 = 784 J.
THANKS

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