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Find **CBSE Class 11 Physics Practice Paper Set-IV** for the coming exam. This paper contains important questions from4^{th} unit (Work, Energy and Power) of class 11 physics. These questions will not only help the students to prepare for exams in a better manner, but will also help them in understanding the depth with which a topic should be studied.

**Few sample questions from the Question Paper are given below:**

**Q. **Two springs of spring constant K_{1} and K_{2} (K_{1} > K_{2}). On which spring, more work is done when they stretched by the same force?

** Q. **Can kinetic energy of a system can be increased or decreased without applying external force on the system?

** Q. **A meteorite burns in the atmosphere before it reaches the earth’s surface. What happens to its momentum?

** Q. **A spring is compressed by tightening its end together tightly. It is then placed in acid and dissolves. What happens to the potential energy stored in it?

** Q. **Is work done by conservative forces is always negative? Explain.

** Q. **Particle A makes a perfectly elastic collision with another particle B at rest. They fly apart in opposite direction with equal speeds. What is the ratio of their masses?

**Q.** What are conservative and non-conservative forces give examples?

** Q. **What should be the angle between the force and displacement for work done to be maximum and minimum?

** Q. **A truck and a car moving with the same kinetic energy are stopped by applying same retarding force. Which one will stop at a smaller distance?

** Q. **A bullet if mass

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