ECAT Pre Engineering Physics Chapter 4 online mcq test with answers for chapter 4 (Work and Energy)

Physics ECAT Pre Engineering Chapter 4 Work and Energy Online Test

Sr. #	Questions	Answers Choice
1	Work has a dimension as that of:	Torque Angular momentum Linear momentum Power
2	If force and displacement are in opposite direction, the work done is taken as:	Positive work Negative work Zero work Infinte work
3	The work performed on an object does not depend on:	Force applied Angle at which force is inclined to the displacement Initial velocity of the object Displacement
4	Work is always done on a body when:	A force acts on it It moves through certain distance None of A and B is correct Both A and B is correct
5	Work is a:	Scalar quantity Vector quantity Base quantity None of these
6	The work done on the body will be zero if:	No force is applied on the body Force is applied but no displacement Angle between F(force) and d(displacement) is 90<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> All of these are correct
7	A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60° with the horizontal. The work done by the boy is:	1.25 J 12.5 J 125 J None of these
8	If we draw a graph between d (along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis, then area under this straight line represents:	Power Work Pressure None of these
9	When a wall is pushed by a person very strongly, he has done:	Maximum work Zero work Positive work Negative work
10	The work done by a force keeping an object in circular motion with constant speed is:	Zero J. 0.1 J 1 J 0.01 J
11	Which force is not a conservative force:	Frictional force Gravitational force Electric force Elastic spring force
12	A labourer carrying a distance a load on his head moves from rest on a horizontal road to another point where he comes to rest. He has done:`	Minimum work <div>Maximum work</div> Zero work Negative work
13	A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:	0<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 30<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 60<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 90<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span>
14	A 100 Kg car is moving at the speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against the friction is:	+5 X 10<sup>1</sup>J +5 X 10<sup>2</sup>J +5 X 10<sup>3</sup>J +5 X 10<sup>4</sup>J
15	The total work done in moving the body up and then down through the same height in a gravitational field is equal to:	mgh Its wight Weight X height Zero

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