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A pulley is a simple machine having a rope that passes over a grooved wheel. A fixed pulley is attached to a solid support and changes the direction of force. Resistance force, the weight of an object being lifted, is attached to one end of a rope going over a fixed pulley. Effort force is exerted on the other end of the rope.
A movable pulley moves along the rope with the resistance force, and the direction of the force is not changed. A pulley system may have a single pulley or a combination of pulleys. Pulleys are used to make work easier.
What happens to people in automobile collisions is important information for car manufacturers. Crash dummies are often used in collision studies. Velocity is one of the most important factors in such collision studies. In this experiment, you will study the relationship between car velocity and the distance a “crash dummy” is thrown during a collision. You will use a Sensor Cart to measure the velocity of the cart and a ruler to measure the distance a crash dummy is thrown.