Work And Energy Test

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Work And Energy Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

The total work done on a particle is equal to the change in its kinetic energy

A
always

B
only if the forces acting on the body are conservative

C
only if the forces acting on the body are gravitational

D
only if the forces acting on the body are elastic
Question 2
1 / -0

When the force retards the motion of a body, the work done by the force is

A
zero

B
negative

C
positive

D
positive or negative depending upon the magnitude of force and displacement.
Question 3
1 / -0

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 the force makes with the direction of motion of the body is

A
0°

B
30°

C
60°

D
90°
Question 4
1 / -0

A particle moves along the x - axis from x = 0 to x= 5m, under the influence of a force given by F = 7 -2x + 3x². The work done in the process is

A
107

B
270

C
a100

D
135
Question 5
1 / -0

When work done by force of gravity is negative

A
Potential energy increases

B
Kinetic energy decreases

C
Potential energy remains constant

D
Potential energy decreases
Question 6
1 / -0

When work done by a force on a particle is positive Kinetic energy may increase

A
Kinetic energy may increase

B
Kinetic energy may decrease

C
Kinetic energy may be constant

D
All of these
Question 7
1 / -0

A chain is held on a frictionless table with one third of its length hanging over the edge. If the chain has a length L and mass M, how much work is required to pull the hanging part back on the table

A
mgL

B
MgL / 3

C
MgL / 9

D
MgL / 18

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Re-Attempt Weekly Quiz Competition

Work And Energy Test - 1

Result

Work And Energy Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

always

only if the forces acting on the body are conservative

only if the forces acting on the body are gravitational

only if the forces acting on the body are elastic

Question 2

zero

negative

positive

positive or negative depending upon the magnitude of force and displacement.

Question 3

0°

30°

60°

90°

Question 4

107

270

a100

135

Question 5

Potential energy increases

Kinetic energy decreases

Potential energy remains constant

Potential energy decreases

Question 6

Kinetic energy may increase

Kinetic energy may decrease

Kinetic energy may be constant

All of these

Question 7

mgL

MgL / 3

MgL / 9

MgL / 18

User

Question Analysis

My Perfomance

Score

-

Rank

-

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