PS.5.2.1 (5.P.1.4) #2: Schoolnet

Potential energy is the energy stored in an object due to its position or state. For example, a compressed spring has potential energy because it can do work when released.

Kinetic energy is the energy of an object in motion. The faster an object moves, the more kinetic energy it has.

The greater the mass of an object, the more force is needed to change its motion. Heavier objects are harder to move and require more force.

Force is a push or pull that can cause an object to move or change its motion. More force results in greater acceleration.

Gravity is a force that pulls objects toward each other. On Earth, it pulls objects toward the center of the planet.

An object's speed increases when it goes downhill due to the force of gravity acting on it.

Friction is a force that opposes motion between two surfaces in contact. It can slow down or stop moving objects.

Adding mass to a shopping cart makes it more difficult to move because it requires more force to push.

The best way to lift a heavy object with a shovel is to use proper technique, such as bending your knees and keeping your back straight.

The marble will follow a curved path as it is propelled forward by the spring's force.