Podcast
Questions and Answers
Which of the following quantities is a scalar?
Which of the following quantities is a scalar?
If the angle between force and displacement is 90 degrees, then the work done is ________.
If the angle between force and displacement is 90 degrees, then the work done is ________.
What is the SI unit of energy?
What is the SI unit of energy?
Which of the following is an example of kinetic energy?
Which of the following is an example of kinetic energy?
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Study Notes
Scalars and Vectors
- Scalars are quantities that have magnitude but no direction, such as temperature and mass.
Work and Force
- When the angle between force and displacement is 90 degrees, the work done is zero. This is because work is defined as the product of force and displacement in the direction of the force.
SI Unit of Energy
- The SI unit of energy is the joule (J), which is defined as the amount of work done when a force of one newton displaces an object by one meter in the direction of the force.
Kinetic Energy
- Kinetic energy is the energy an object possesses due to its motion, with examples including a moving car, a flying ball, or a running athlete.
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Description
Test your knowledge of work, power, and energy with this quiz designed for JEE Mains preparation. Questions cover concepts such as scalar quantities, work done at a 90-degree angle, SI unit of energy, and examples of kinetic energy.
