A spring with a spring constant of 500 N/m is used to propel a 0.47-kg mass up a

Question

A spring with a spring constant of 500 N/m is used to propel a 0.47-kg mass up an inclined plane. The spring is compressed 30 cm from its equilibrium position and launches the mass from rest across a horizontal surface and onto the plane. The plane has a length l = 3 m and is inclined at 34°. Both the plane and the horizontal surface have a coefficient of kinetic friction with the mass of 0.35. When the spring is compressed, the mass is at distance d = 1.6 m from the bottom of the plane.

- What is the speed of the mass as it reaches the bottom of the plane?

Explanation / Answer

here -ve sign indicates energy is lost.

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