4. A warehouse worker pushes a crate of mass 24kg up a ramp. Assume that he pushes 4.0m from rest in exactly 8.0 seconds. Assume further that the box is moving up the incline at a constant speed. If the effective coefficient of friction is 0.25, determine the average force 0 = 30 exerted onto the box. What will be the power? Answer: assuming acceleration is a constant, As = 2
4. A warehouse worker pushes a crate of mass 24kg up a ramp. Assume that he pushes 4.0m from rest in exactly 8.0 seconds. Assume further that the box is moving up the incline at a constant speed. If the effective coefficient of friction is 0.25, determine the average force 0 = 30 exerted onto the box. What will be the power? Answer: assuming acceleration is a constant, As = 2
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Transcribed Image Text:A warehouse worker pushes a crate of mass
24kg up a ramp. Assume that he pushes 4.0m
from rest in exactly 8.0 seconds. Assume
further that the box is moving up the incline at
a constant speed. If the effective coefficient of
friction is 0.25, determine the average force
0 = 30.0°
exerted onto the box. What will be the power?
Answer: assuming acceleration is a constant, As =
(v+v,)At v,
=1.0 m
avgAs =–
2
m(v; -vi )=F.
W.
= 3.0N, P=
At
12J
=1.5W
8s
net
avg
Source: modified from Nelson, Physics 12, 2009, p. 170, Question #5
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