1:31 PM ..ooo AT&T; T 80% session masteringphysics.com Exercise 6.30 Mastering P

Question

1:31 PM ..ooo AT&T; T 80% session masteringphysics.com Exercise 6.30 Mastering Physics Exercise 6.30 A child applies a force F parallel to the z-axis to a 10.0-kg sled moving on the frozen surface of a small pond. As the child controls the speed of the sled, the z-component of the force she applies varies with the z-coordinate of the sled as shown in the figure Fr (N) 10 L x (m) 12 Q Tap image to zoom Part A Calculate the work done by the force F when the sled moves from z 0 to 8.0m. Express your answer using two significant figurs.

Explanation / Answer

here,

m = 10 kg

A)

the work done , W1 = area under the curev

W1 = 0.5 * (8-0) * ( 10 - 0) J

W1 = 40 J

B)

the work done , W2 = area under the curev

W2 = 0.5 * (12 - 8) * ( 10 - 0) J

W2 = 20 J

C)

the net work done , W = w1 + W2

W = (40 + 20) J = 60 J

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