(10%) Problem 10: It takes a student 5.3 s to push a block m = 17 kg at a consta
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(10%) Problem 10: It takes a student 5.3 s to push a block m = 17 kg at a constant velocity over a distance of d = 8.3 m The coefficient of friction between the block and the ground is 0.37 33% Part (a) Write an expression using the variables provided for the force applied by the student Fs. Grade Summary 0% 100% Attempts remaining: S 4 5 6 % per attempt) detailed view Submit Hint I give up! Hints: 1 % deduction per hint. Hints remaining: 3 Feedback: 1% deduction per feedback. -là 33% Part (b) Write an expression for the energy required for the work done by the student in moving the block along this path in terms of the variables provided 33% Part (c) How much power, in Watts, was applied to the block by the student?Explanation / Answer
here,
t = 5.3 s
m = 17 kg
d = 8.3 m
u = 0.37
a)
let the force applied be F
as the block is moving with constant velocity
F - u * m * g = 0
F = u * m * g
b)
the energy required , E = work done by student
E = F * d
c)
power supplied , P = E/t
P = F * d /t
P = u * m * g * d / t
P = 0.37 * 17 * 9.81 * 8.3 /5.3 W
P = 96.6 W
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