FREE AZSCI Physical Science Questions and Answers
Which of the following is an example of a force?
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.
What happens to the speed of a car if the force applied to it increases while its mass remains the same?
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.
What is the primary cause of friction between two surfaces?
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.
Which of the following best describes the energy stored in a compressed spring?
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.
Which of the following statements about the law of conservation of energy is correct?
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.