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- NOTE: It might help to think about this problem by replacing the ”pendulum bob” with akid on a swing with a mass of 10 kg. (Sketchit!)A pendulum bob is released from some initial height such that the speed of the bob atthe bottom of the swing is 2.8 m/s.The acceleration of gravity is 9.81 m/s2.What is the initial height of the bob?Answer in units of m.In the figure below, a block of m= mass 19 kg is released from rest on a frictionless incline angled of angle theta= 30 degrees. Below the block is a spring that can be compressed 2.0cm by a force of 240 N. The block momentairly stops when it compresses the spring by 5.6cm. A) How far has the block moved down the incline to this stopping point? B) What is the speed of the block just as it touches the spring?5.6 N/m3. The particle's speed at A, where xA A particle of mass 3.4 kg is constrained to move along the x-axis under a single force F(x) = -cx', where c = m/s) at B, where xB 1.0 m, is 6.3 m/s. What is its speed (in = -2.0 m? m/s
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