A block is pushed against the spring with spring constant 4.3 kN/m (located on t

Question

A block is pushed against the spring with spring constant 4.3 kN/m (located on the left-hand side of the track) and compresses the spring a distance 5.4 cm from its equilibrium position (as shown in the figure below). The block starts at rest, is accelerated by the compressed spring, and slides across a frictionless track except for a small rough area on a horizontal section of the track (as shown in the figure below). It leaves the track horizontally, flies through the air, and subsequently strikes the ground. The acceleration of gravity is 9.8 m/s2. What is the speed v of the block when it leaves the track? Answer in units of m/s

Explanation / Answer

6.2694-2.8253=1/2 m v ^2 v = 3.46m/s

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