A spring is used to launch a block up a frictionless ramp as shown at right. At

Question

A spring is used to launch a block up a frictionless ramp as shown at right. At time t, the spring is compressed and the block is released from point A. The block moves up the ramp, losing contact with the spring at point B. When it passes point C, the block has a velocity vc directed up the ramp.

Imagine a system that includes the block and possibly one or more additional objects.

a. Is it possible to choose a system whose total energy is constant during the interval from t1 to t2? If so, state which object(s) must be included in the system. Explain.

b. Is it possible to choose a system so that the total energy is NOT constant during the interval from t{ to ?2? if so what is the system containing the fewest possible objects for which the energy is not constant during this interval. Explain.

Explanation / Answer

there is no need of figure for this problem as this is a theoretical problem. a) yes it is possible. for this system must contain block and spring. b) yes it is also possible for this system may have just block.

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