You have a simple pendulum consisting of a small 450 g mass attached to a 1.20 m long string. Initially, the pendulum hangs vertically at rest. You pull the pendulum mass back so that the string is 35.0° from its vertical position. 1) Find the change in height of the mass compared to when it was hanging vertically. 2) Find the change in the potential energy of the mass compared to when it was hanging vertically. 3) You now release the pendulum. Set up a conservation of energy equation and use it to find the pendulum's speed at the lowest point of its swing

A box with mass of 150 kg is released from point A, 43 meters above the ground. The box slides without friction and then collides with a massless spring that is initially uncompressed.  a) What is the total energy of the system? b) What is the speed of the box right before colliding with the spring? After colliding with the spring, the box gets stuck to the spring and starts oscillating back and forth. c) If the spring constant is 300 N/m, what is the amplitude of oscillation for the box-spring system? d) When the spring is compressed by Δs = 1.5 m, find the speed of the box. e) Find the maximum acceleration experienced by the box.  f) What is the period of oscillation?

A spring with a spring constant of 240 N/m has a 6-kg mass attached to the end of it and is stretched a distance of .6 m. what is the potential energy of the spring?if you let go of the spring, how fast is the mass moving when at the equilibrium point?

Question 4 Consider a swinging pendulum. When the pendulum is moving towards its middle point, which of the following statements about its energy is correct? Decreasing gravitational potential energy, constant kinetic energy Increasing gravitational potential energy, decreasing kinetic energy Decreasing gravitational potential energy, increasing kinetic energy Increasing gravitational potential energy, constant kinetic energy