WorksheetsUsaha dan Energi
Total questions: 10
Worksheet time: 5mins
What is the Law of Conservation of Energy?
Energy can only be created from matter.
Energy is a fixed quantity that cannot change.
Energy cannot be created or destroyed, only transformed.
Energy can be created and destroyed.
How does energy change forms in a closed system?
Energy can only exist as kinetic energy in a closed system.
Energy can be created or destroyed in a closed system.
Energy remains unchanged in form and quantity.
Energy changes forms through conversion and transformation while total energy remains constant.
Define work in the context of physics.
Work is the speed at which an object moves.
Work is the energy transferred when a force is applied to an object over a distance.
Work is the amount of force applied to an object.
Work is the total energy stored in an object.
What is the formula for calculating work?
Work = Distance / Time
Work = Force × Distance × cos(θ)
Work = Force / Distance
Work = Force + Distance
If a force of 10 N moves an object 5 m, how much work is done?
25 J
50 J
40 J
75 J
Explain the relationship between work and energy.
Work and energy are directly related; work done on an object results in a change in its energy.
Energy can exist without any work being done.
Work is unrelated to energy and does not affect it.
Work is a form of energy that cannot change an object's state.
What is kinetic energy and how is it calculated?
Kinetic energy is the energy of an object at rest.
Kinetic energy is calculated using the formula KE = m * v.
Kinetic energy is calculated using the formula KE = 0.5 * m * v^2.
Kinetic energy is the energy stored in an object due to its position.
Describe potential energy and give an example.
A stretched rubber band has no potential energy until released.
An example of potential energy is a rock positioned at the top of a hill; it has gravitational potential energy due to its height.
A car moving at high speed has potential energy due to its motion.
A fish swimming in water has potential energy because it is in a liquid environment.
How does friction affect the work done on an object?
Friction only affects the speed of an object, not the work done.
Friction increases the total work done on an object by adding energy.
Friction has no effect on the work done on an object.
Friction reduces the net work done on an object by converting some of the work into heat.
What is the unit of energy in the International System of Units?
watt
calorie
joule
volt
