Ex.8. A crate of mass 10.0 kg is pulled up a rough incline with an initial speed of 1.50 m/s. The pulling force is 10ON parallel to the incline, which makes an angle of 20.0° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 5.00m. (a) How much work is done by gravity? (b) How much energy is lost due to friction? (c) How much work is done by the 100N force? (d) What is the change in kinetic energy of the crate? (e) What is the speed of the crate after being pulled 5.00m? 5.00 m = 110° 70 20° 20° F (a) (b)
Ex.8. A crate of mass 10.0 kg is pulled up a rough incline with an initial speed of 1.50 m/s. The pulling force is 10ON parallel to the incline, which makes an angle of 20.0° with the horizontal. The coefficient of kinetic friction is 0.400, and the crate is pulled 5.00m. (a) How much work is done by gravity? (b) How much energy is lost due to friction? (c) How much work is done by the 100N force? (d) What is the change in kinetic energy of the crate? (e) What is the speed of the crate after being pulled 5.00m? 5.00 m = 110° 70 20° 20° F (a) (b)
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Transcribed Image Text:Ex.8. A crate of mass 10.0 kg is pulled up a rough incline with an initial speed of
1.50 m/s. The pulling force is 100N parallel to the incline, which makes an angle
of 20.0° with the horizontal. The coefficient of kinetic friction is 0.400, and the
crate is pulled 5.00m. (a) How much work is done by gravity? (b) How much
energy is lost due to friction? (c) How much work is done by the 100N force? (d)
What is the change in kinetic energy of the crate? (e) What is the speed of the
crate after being pulled 5.00m?
5.00 m
O = 110°
00.....*
200
20°
F
(b)
Solvo:
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