A 0.12 kg mass is hung from a string creating a pendulum. It’s raised 8 cm vertically and let go. Neglecting losses to heat, what’s the maximum velocity it reaches? 100 cm = 1 m

A 388 g mass is hung on the spring assembly shown below. The mass stretches the springs to equilibrium. Each spring has a spring constant of 0.75 N/cm. Use g = 10 N/kg.   Determine the work done in Joules on the bottom spring by the mass. Note: All units should be in kg and m.

A 10.0 kg block is released from point A in the figure. The track is frictionless except for the portion BC, of length 14 m. 10.0 kg 3.00 m B C k mmmmmm plz help and use g = 9.8 The block travels down the track, hits a spring of force constant k = 1,631 N/m, and compresses it 0.1 m from its equilibrium position as it comes to rest momentarily. Determine the coefficient of kinetic friction between surface BC and the block. Express your answer to at least two digits after the decimal point.

A 0.4kg mass is moving at 4.0m/s and is at a height of1.2m above the level ground.  The total mechanical energy of the object is