A 3.1-kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 3.8 m/s2, find the force exerted by the rope on the bucket.
2.
Two blocks of masses m and 2m are held in equilibrium on a frictionless incline as in the figure. In terms of m and θ, find the following. (Use any variable or symbol stated above along with the following as necessary: g.)
(a) the magnitude of the tension T1 in the upper cord
T1 =
(b) the magnitude of the tension T2 in the lower cord connecting the two blocks
T2 =
3.
Two packing crates of masses m1 = 10.0 kg and m2 = 4.70 kg are connected by a light string that passes over a frictionless pulley as in the figure. The 4.70-kg crate lies on a smooth incline of angle 39.0°.
(a) Find the acceleration of the 4.70-kg crate.
m/s2 (up the incline)
(b) Find the tension in the string.
N
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