The pair of pulleys is used to lift a 40-kg block 0.25 m. The constant upward acceleration of the block during the lift is +2.5 m/s^2, and the pulleys and rope have negligible inertia and negligible friction. A. What is the tension in the pulling rope? Express your answer with the appropriate units. B. What is the tension in the rope from which the block hangs? Express your answer with the appropriate units. C. Determine the magnitude of the force exerted by the upper mount on the top pulley. Express your answer with the appropriate units. D. How much work is done by the person pulling the rope in lifting the block 0.25 mm? Express your answer with the appropriate units. E. By how much does the kinetic energy of the block change in this process? Express your answer with the appropriate units. F. How much work is done on the block by the rope attached to it? Express your answer with the appropriate units. G. How much work does the ceiling do in this process? Express your answer with the appropriate units. H. How much work does Earth do on the block? Express your answer with the appropriate units.
The pair of pulleys is used to lift a 40-kg block 0.25 m. The constant upward acceleration of the block during the lift is +2.5 m/s^2, and the pulleys and rope have negligible inertia and negligible friction.
A.
What is the tension in the pulling rope?
Express your answer with the appropriate units.
B.
What is the tension in the rope from which the block hangs?
Express your answer with the appropriate units.
C.
Determine the magnitude of the force exerted by the upper mount on the top pulley.
Express your answer with the appropriate units.
D.
How much work is done by the person pulling the rope in lifting the block 0.25 mm?
Express your answer with the appropriate units.
E.
By how much does the kinetic energy of the block change in this process?
Express your answer with the appropriate units.
F.
How much work is done on the block by the rope attached to it?
Express your answer with the appropriate units.
G.
How much work does the ceiling do in this process?
Express your answer with the appropriate units.
H.
How much work does Earth do on the block?
Express your answer with the appropriate units.
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