A force is a push or pull that can cause an object to move or change its motion. Throwing a ball involves applying a force, which causes the ball to move. The other options describe physical changes but do not involve a force.
According to Newton's second law of motion, acceleration is directly proportional to the force applied and inversely proportional to the mass of the object. If the mass remains constant, increasing the force will result in an increase in speed.
Friction occurs when two surfaces interact, and the roughness or microscopic bumps on the surfaces create resistance as they slide past each other. The weight and temperature of the objects can influence friction, but surface roughness is the primary factor.
When a spring is compressed, energy is stored due to its position or configuration, making it potential energy. This energy has the potential to do work when the spring is released.
The law of conservation of energy states that energy cannot be created or destroyed. It can only change forms, such as from kinetic to potential energy, but the total energy remains constant.
