JAMB Exam > JAMB Videos > Physics for JAMB > Introduction: Work & Energy - 2
Introduction: Work & Energy - 2 Video Lecture | Physics for JAMB
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FAQs on Introduction: Work & Energy - 2 Video Lecture - Physics for JAMB
| 1. What is work and energy? |  |
Ans. Work is defined as the transfer of energy that occurs when an object is moved against a force. Energy, on the other hand, is the ability to do work or cause change. In simpler terms, work is the application of force over a distance, while energy is the capacity to do work.
| 2. How is work calculated? | |
Ans. Work can be calculated using the formula: Work = force × distance × cosθ, where force is the applied force, distance is the displacement of the object, and θ is the angle between the force and the displacement vectors. The unit of work is joules (J).
| 3. What is the relationship between work and energy? | |
Ans. Work and energy are closely related. When work is done on an object, energy is transferred to or from that object. Work done on an object increases its energy, while work done by an object decreases its energy. Therefore, work and energy are two sides of the same coin.
| 4. How is kinetic energy related to work? | |
Ans. Kinetic energy is the energy possessed by an object due to its motion. The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy. In other words, work done on an object increases its kinetic energy, and work done by an object decreases its kinetic energy.
| 5. What are the different forms of energy? | |
Ans. Energy exists in various forms. Some common forms of energy include kinetic energy (energy of motion), potential energy (stored energy), thermal energy (heat energy), chemical energy (energy stored in chemical bonds), electrical energy (energy of moving electrons), and nuclear energy (energy released from atomic reactions).
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