DOWNLOAD MOBILE APPLICATION TO LEARN MORE: WORK POWER AND ENERGY JEE ADVANCED QUESTIONS
DOWNLOAD MOBILE APPLICATION TO LEARN MORE: WORK POWER AND ENERGY JEE ADVANCED QUESTIONS
Table of Contents
WORK POWER AND ENERGY JEE ADVANCED QUESTIONS
1. The work done by external forces on a system is equal to the change in
(a) Total energy
(b) Kinetic energy
(c) Potential energy
(d) None of these
Ans.(a)
2. A bead on a smooth circular wire frame of radius r which is fixed in a vertical plane. The bead is slightly displaced from the highest point of the wire frame. The speed of the bead subsequently as a function of the angle
3. A body of mass m slides downward along a plane inclined at an angle
. The coefficient of friction is
. The rate at which mechanical energy dissipates expressed as a function of time, is
7. A variable force F acts on a body which is free to move. The displacement of the body is proportional to t3 where t = time. The power delivered by given by F to the body will be proportional to
(a) t
(b) t2
(c) t3
(d) t4.
Ans. (c)
8.The work done by a conservative force on a system is equal to
(a) The change in kinetic energy of the system
(b) The change in potential energy of the system
(c) The change in total mechanical energy of the system
(d) None of the above
Ans. (b)
9. Figure below shows a plot of conservative force F in A unidimensional field. The plot representing the function corresponding to the potential energy (U) in the field is
Ans. (d)
10. System shown in fig is released from rest with mass of 2 kg in contact with the ground. Pulley and spring are massless and the friction is absent everywhere. The speed of a 5 kg block when the 2 kg block leaves contact with the ground (force constants of the spring k = 40 N/m and g = 10 m/s)
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