Energy - JSS2 Basic science Past Questions and Answers - page 2
When does an object have maximum potential energy?
When it is at rest
When it is moving slowly
When it is in motion
When it is at its lowest point
Can you give an example of potential energy in everyday life?
An example of potential energy is a stretched rubber band. When you stretch a rubber band, it stores potential energy due to its stretched position.
How does kinetic energy relate to the speed of an object?
Kinetic energy is directly related to the speed of an object. The faster an object moves, the more kinetic energy it has.
What factors affect the amount of work done when moving an object?
The amount of work done when moving an object depends on the force applied and the distance over which the force is applied. So, factors such as the magnitude of force and the distance traveled influence the work done.
Can you explain how work done can change an object's energy?
Work done can change an object's energy by transferring energy to or from the object. For example, if you push a box and it moves, you're doing work on it, transferring energy to increase its kinetic energy.
How does the potential energy of an object change as its position changes?
The potential energy of an object changes with its position. For example, as an object is lifted higher against gravity, its potential energy increases because it's being raised to a higher position.
In what situations would an object have both potential and kinetic energy simultaneously?
n object would have both potential and kinetic energy simultaneously when it is in motion while also being at a position where it can potentially do work. For example, a swinging pendulum has both kinetic energy due to its motion and potential energy due to its position at the top of the swing.