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1.
In case of negative work the angle between the force and displacement is
2.
How much time will it take to perform 440 J of work at a rate of 11 W?
3.
When a stone tied to a string is whirled in a circle, the work done on it by the string is
4.
Match the Column I and Column II.
Column-I
A. Electric motor
B. Electric bell
C. Electric bulb electrical
D. Photoelectricmechanical
E. Steam engine light Energy
Column-II
P. Electrical energy to sound energy
Q. Electrical energy to mechanical energy
R. Light energy to Energy
S. Heat energy to cell energy
T. Electric energy to
Column-I
A. Electric motor
B. Electric bell
C. Electric bulb electrical
D. Photoelectricmechanical
E. Steam engine light Energy
Column-II
P. Electrical energy to sound energy
Q. Electrical energy to mechanical energy
R. Light energy to Energy
S. Heat energy to cell energy
T. Electric energy to
5.
6.
Two masses m and 9 m are moving with equal kinetic energies. The ratio of the magnitudes of their momenta is
7.
A particle oscillates in one dimension about the equilibrium position subject to a force Fxx(x) that has an associated potential energy U(x). If k is the force constant, which one of the following relations is true?
8.
If a light body and a heavy body have equal momentum, then
9.
A rubber ball dropped from 24 m height loses its kinetic energy by 25%. What is the height to which it rebounds.
10.
The potential energy of a freely falling object decreases progressively.