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Fact Sheet : Class 11 | Physics | chapter 6 | WORK ENERGY AND POWER

Ruhul Amin Alig

Class 11 | Physics | chapter 6 | WORK ENERGY AND POWER

A block of mass m is kept on a platform which starts from rest with constant acceleration g/ 2 upward, as shown in fig. work done by normal reaction on block in time t is:

Ruhul Amin Alig

Class 11 | Physics | chapter 6 | WORK ENERGY AND POWER

NOTES : WORK, ENERGY & POWER in 1 Shot : All Concepts, Tricks & PYQs | NEET Crash Course | UMEED 2.0

Ruhul Amin Alig

Kinetic Energy

A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces, each of mass (m) move perpendicular to each other with equal speeds (v). The total kinetic energy generated due to explosion is

Ruhul Amin Alig

Kinetic Energy

Before a rubber ball bounces off from the floor, the ball is in contact with the floor for a fraction of second. Which of the following statements is correct? (a) Conservation of energy is not valid during this period (b) Conservation of energy is valid during this period (c) As ball is compressed, kinetic energy is converted to compressed potential energy (d) None of these

Ruhul Amin Alig

Kinetic Energy

A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement x is proportional to

Ruhul Amin Alig

Kinetic Energy

An electron and a proton are moving under the influence of mutual forces. In calculating the change in the kinetic energy of the system during motion, one ignores the magnetic force of one on another. This is because, (a) the two magnetic forces are equal and opposite, so they produce no net effect. (b) the magnetic forces do no work on each particle. (c) the magnetic forces do equal and opposite (but nonzero) work on each particle. (d) the magnetic forces are necessarily negligible.

Ruhul Amin Alig

Kinetic Energy

At time t = 0s particle starts moving along the x-axis. If its kinetic energy increases uniformly with time t, the net force acting on it must be proportional to

Ruhul Amin Alig

Kinetic Energy

Kinetic energy, with any reference, must be (a) zero (b) positive (c) negative (d) both (b) and (c)

Ruhul Amin Alig

Kinetic Energy

According to work-energy theorem, the work done by the net force on a particle is equal to the change in its (a) kinetic energy (b) potential energy (c) linear momentum (d) angular momentum

Ruhul Amin Alig

Class 11 | Physics | chapter 6 | WORK ENERGY AND POWER

Class 11 | Physics | chapter 6 | WORK ENERGY AND POWER MCQs

Ruhul Amin Alig

MCQs | NEET |JEE WORK ENERGY AND POWER

Class 11 | Physics | chapter 6 | WORK, ENERGY AND POWER | FACT/DEFINITION TYPE QUESTIONS | MCQs | NEET | JEE

Ruhul Amin Alig