Short Answer Questions
1. Explain how the definition of work in physics is different from general perception.
In general perception, "work" means any physical or mental effort that causes tiredness.
In contrast, Work in Physics has a strict scientific definition: work is done only when an applied force moves an object and causes a displacement.
If there is no movement, no work is done in physics, no matter how hard you try.
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2. Write the various types of potential
energy. Explain the formulae.
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3. Write the differences between
conservative and Non-conservative
forces. Give two examples each
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4. Explain the characteristics of elastic
and inelastic collision.
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| elastic collision |
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5. Define the following
a) Coefficient of restitution
a) Coefficient of restitution
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b) Power
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c) Law of conservation of energy
It states that energy neither be created nor destroyed.
It may transform from one form to another.
The total energy of an isolated system remains constant.
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d) loss of kinetic energy in inelastic
collision
In perfectly inelastic collision, the loss in kinetic energy during collision is transformed to another form of energy like sound, thermal, heat, light etc
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Long Answer Questions
1. Explain with graphs the difference between work done by a constant force and by a variable force.
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2. State and explain work energy principle.
Mention any three examples for it.
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3. Arrive at an expression for power and
velocity. Give some examples for the
same.
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4. Arrive at an expression for elastic
collision in one dimension and discuss
various cases.
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| case1 |
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| case2 |
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| case3 |
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| case 4 |
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5. What is inelastic collision? In which
way it is different from elastic collision.
Mention few examples in day to day
life for inelastic collision.
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