Work and Energy Test

Result

Work and Energy Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

A porter with a suitcase on his head is climbing up a flight of stairs with a uniform speed. The work done by the ‘weight of the suitcase’ on the suitcase is

A
positive

B
negative

C
zero

D
undefined
Question 2
1 / -0

When a body rolls down an inclined plane, it has

A
only kinetic energy

B
only potential energy

C
both kinetic energy and potential energy

D
neither kinetic energy nor potential energy
Question 3
1 / -0

Two bodies of unequal masses are dropped from a cliff. At any instant, they have equal

A
momentum

B
acceleration

C
potential energy

D
kinetic energy
Question 4
1 / -0

A mass of 60 kg is moved vertically upwards through a distance of 4 m. If the gravitational acceleration is 9.8 ms–2, then the work done against gravity is

A
588 J

B
2352 J

C
240 J

D
2340 J
Question 5
1 / -0

A person A does 500 J of work in 10 minutes and another person B does 600 J of work in 20 minutes. Let the power delivered by A and B be P_A and P_B respectively. Then,

A
P_A = P_B

B
P_A > P_B

C
P_A < P_B

D
P_A and P_B are undefined
Question 6
1 / -0

When a body falls freely towards the earth, then its total energy

A
increases

B
decreases

C
remains constant

D
first increases and then decreases
Question 7
1 / -0

In case of negative work, the angle between the force and displacement is

A
0°

B
45°

C
90°

D
180°
Question 8
1 / -0

Which one of the following is not the unit of energy?

A
joule

B
newton metre

C
kilowatt

D
kilowatt hour
Question 9
1 / -0

The work done on an object does not depend upon the

A
displacement

B
force applied

C
angle between force and displacement

D
initial velocity of the object
Question 10
1 / -0

Water stored in a dam possesses

A
no energy

B
electrical energy

C
kinetic energy

D
potential energy

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Question Analysis

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Re-Attempt Weekly Quiz Competition

Work and Energy Test - 4

Result

Work and Energy Test - 4

Score

-

Rank

-

SHARING IS CARING

Question 1

positive

negative

zero

undefined

Question 2

only kinetic energy

only potential energy

both kinetic energy and potential energy

neither kinetic energy nor potential energy

Question 3

momentum

acceleration

potential energy

kinetic energy

Question 4

588 J

2352 J

240 J

2340 J

Question 5

PA = PB

PA > PB

PA < PB

PA and PB are undefined

Question 6

increases

decreases

remains constant

first increases and then decreases

Question 7

0°

45°

90°

180°

Question 8

joule

newton metre

kilowatt

kilowatt hour

Question 9

displacement

force applied

angle between force and displacement

initial velocity of the object

Question 10

no energy

electrical energy

kinetic energy

potential energy

User

Question Analysis

My Perfomance

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-

Rank

-

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P_A = P_B

P_A > P_B

P_A < P_B

P_A and P_B are undefined