AFMC SERIES Physics
Work Energy And Power
6 previous year questions.
Volume: 6 Ques
Yield: Medium
High-Yield Trend
2
2010 3
2008 1
2007 Chapter Questions 6 MCQs
01
PYQ 2007
medium
physics ID: afmc-200
A child is swinging a swing. Minimum and maximum heights of swing from earth's surface are and respectively. The maximum velocity of this swing is
1
5 m/s
2
10 m/s
3
15 m/s
4
20 in/s
02
PYQ 2008
medium
physics ID: afmc-200
For a system to follow the law of conservation of linear momentum during a collision, the condition is (1) total external force acting on the system is zero. (2) total external force acting on the system is finite and time of collision is negligible. (3) total internal force acting on the system is zero.
1
(1) only
2
(2) only
3
(3) only
4
(1) or (2)
03
PYQ 2008
medium
physics ID: afmc-200
A motor is used to deliver water at a certain rate through a given horizontal pipe. To deliver -times the water through the same pipe in the same time the power of the motor must be increased as follows
1
-times
2
-times
3
-times
4
-times
04
PYQ 2008
medium
physics ID: afmc-200
A machine is delivering constant power to drive a body along a straight line. What is the relation between the distance travelled by the body against time
1
2
3
4
05
PYQ 2010
medium
physics ID: afmc-201
An open water tight railway wagon of mass coasts at an initial velocity of without friction on a railway track. Rain falls vertically downwards into the wagon. What change occurs in KE of the wagon, when it has collected of water?
1
900 J
2
300 J
3
600 J
4
1200 J
06
PYQ 2010
medium
physics ID: afmc-201
A cyclist rides up a hill at a constant velocity. Determine the power developed by the cyclist if the length of the connecting rod of the pedal is , the time of revolution of the rod is and the mean force exerted by his foot on the pedal is .
1
115.6 W
2
215.6 W
3
15.6 W
4
11 .56 W