Conservation of Energy

• ME7.3 Weight and Spring

A spring is attached on a table clamp and oscillates when the mass is displaced. Under the assumption that the spring coefficient is constant and neglecting any kind of friction (like air resistance), energy is conserved. The displacement of the mass at each oscillation will be close to the original displacement. A meter stick can be used to measure the displacement, or a simple mark on the table will suffice

• ME7.5 Pendulum Suspended from Blackboard

This is the same concept as below, but here the board is marked to the height of the oscillations so that the students see the actual height.

• ME7.6 Pendulum Suspended from Ceiling

This pendulum is suspended from the ceiling with long rope already attached to the first pillar on the right facing the class. A student volunteer feels the weight of the ball, then attaches it to the rope. He stands by the pillar and put the ball on his nose. Then he lets go and remains in place. From his point of view, he will be hit in the face with the ball, but conservation of energy says that the ball will go no closer to his nose than it was when he let go.

• ME7.7 Roller Coaster Loop

Calculate the minimum height required for a ball to make it around a vertical loop, and demonstrate to verify.

• ME7.8 Complete PASCO Roller Coaster System

Roller coaster tracks are constructed by securing flexible track on pegs in the three large support panels