Work, Energy and Power - JSS2 Basic science Past Questions and Answers - page 2
Can you give an example of work being done?
When you push a shopping cart at the grocery store, you're doing work because you're applying a force to move the cart over a distance.
What are the different forms of energy?
Energy comes in various forms including kinetic energy (energy of motion), potential energy (stored energy), thermal energy (heat), chemical energy, electrical energy, and more.
How is power related to the rate of doing work?
Power measures how quickly work is done or energy is transferred. It indicates the rate at which work is performed, meaning higher power indicates work is done faster.
Can you explain the difference between potential and kinetic energy?
Potential energy is stored energy, such as the energy stored in a stretched rubber band or an object lifted off the ground. Kinetic energy, on the other hand, is the energy of motion, like a moving car or a swinging pendulum.
What happens to the amount of work done if the force applied remains constant but the distance increases?
If the force remains constant but the distance increases, the amount of work done also increases. This is because work is the product of force and distance, so if the distance increases, more work is done.
How does power relate to the performance of a machine?
The power of a machine indicates how quickly it can do work. A machine with higher power can perform tasks more rapidly compared to a machine with lower power, assuming both are exerting the same force.