Please hurry need ASAP!!! When a pendulum swings, at which point is kinetic energy highest?
1 answer:
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Answer:
11.82 N upward and parallel to the incline.
Explanation:
Let g = 9.81 m/s2. Gravity that acts on the bin has a magnitude of
W = mg = 3*9.81 = 29.43 N
The gravity component that is parallel to the 40 degree incline is
If the bin is moving at constant speed, then the net force (parallel to the incline) is also 0. Gravity is balanced with the push force of 26 N and the friction force.
The magnitude of friction force is 26 - 18.9 = 7.08 N
The the bin is moving down the incline, then gravity is 18.9N , friction is 7.08 N, one must create an upward force of 18.9 - 7.08 = 11.82 N parallel with the incline to balance this.