ECAT Pre General Science Physics Chapter 4 Work and Energy Online Test With Answers

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ECAT Pre General Science Physics Chapter 4 Work and Energy Online Test

Sr. # Questions Answers Choice
1 A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which 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>
2 A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against 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
3 When a body moves against the force of friction on a horizontal plane, the work done by the body is: Positive Negative Zero None of these
4 In the force applied to parallel to the direction of motion, then the work done is: Positive Negative Zero None of these
5 A 2 kg block is held 1 m above floor for 50 seconds. The work done is: Zero 10.2 J 100 J 980 J
6 Work done in lower and bucket into the well is: Zero Positive Negative None of these
7 A field in which the work done is moving a body along closed path is zero is called: Nuclear filed Conservative field Gravitational field Non-conservative field
8 When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is: 2 J 0.25 J 1 J 0.5 J
9 The work done in moving a body between two points in a conservation field is independent of the: Direction Force applied Path followed by the body Power
10 Which of the following type of force can do no work on the particle on which it acts: Frictional force Gravitational force Electric force Centripetal force
11 The field in which work done is moving body between two points depends upon the path followed is called: Conservative filed Non-conservative field Electric field None of these
12 Work done along a closed path in a gravitational field is: Maximum Minimum Zero Unity
13 A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done is 25J. the angle which the force makes with the direction of motion will be: 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> 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> 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>
14 The space around the earth within which it expects a force of attraction on other bodies is known as: Nuclear field Conservative field Electric field Gravitational field
15 Work done is maximum when angle between force and displacement 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> 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> 180<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> None of these
16 Work has a dimension as that of: Torque Angular momentum Linear momentum Power
17 If force and displacement are in opposite direction, the work done is taken as: Positive work Negative work Zero work Infinte work
18 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
19 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
20 Work is a: Scalar quantity Vector quantity Base quantity None of these
21 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
22 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
23 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
24 When a wall is pushed by a person very strongly, he has done: Maximum work Zero work Positive work Negative work
25 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
26 Which force is not a conservative force: Frictional force Gravitational force Electric force Elastic spring force
27 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
28 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>
29 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
30 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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