class 11th physics notes
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✨ Quiz Time! ✨

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Q1/10: What is the SI unit of work?
Anonymous Quiz
13%
Newton
77%
Joule
8%
Watt
2%
Pascal
Q2/10: Which of the following is a scalar quantity?
Anonymous Quiz
26%
Force
16%
Velocity
43%
Work
10%
Momentum
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Q3/10: The work done by the centripetal force for a body moving in a circular path is:
Anonymous Quiz
17%
Positive
10%
Negative
56%
Zero
17%
Depends on the radius
🔥1
Q4/10: A force F = 3i + 4j N acts on a particle. The displacement is S = 2i + 3j m. The work done is:
Anonymous Quiz
54%
18 J
22%
10 J
20%
24 J
4%
6 J
Q5/10: According to the work-energy theorem, the net work done on a particle equals the change in its:
Anonymous Quiz
22%
Potential energy
44%
Kinetic energy
27%
Mechanical energy
6%
Momentum
Q6/10: If the velocity of a moving object is doubled, its kinetic energy becomes:
Anonymous Quiz
28%
Two times
56%
Four times
14%
Half
2%
One-fourth
Q7/10: The rate of doing work is known as:
Anonymous Quiz
37%
Energy
50%
Power
5%
Force
7%
Momentum
Q8/10: 1 kilowatt-hour (kWh) is equal to:
Anonymous Quiz
21%
3.6 MJ
18%
36 MJ
46%
3.6 kJ
14%
360 J
Q9/10: In an elastic collision, which of the following is conserved?
Anonymous Quiz
18%
Only kinetic energy
23%
Only momentum
56%
Both kinetic energy and momentum
4%
Neither
Q10/10: In a perfectly inelastic collision, the coefficient of restitution e is:
Anonymous Quiz
27%
1
27%
0
41%
Between 0 and 1
5%
Infinity
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✨ Quiz Time! ✨

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Q1/10: A mass of 1 kg is dropped from a height of 10 m. What is its kinetic energy just before hitting the ground? (g = 10 m/s^2)
Anonymous Quiz
14%
10 J
24%
50 J
59%
100 J
4%
0 J
Q2/10: Assertion: Work done by friction over a closed path is zero. Reason: Friction is a non-conservative force.
Anonymous Quiz
34%
Both A and R are true and R explains A
39%
Both A and R are true but R does not explain A
8%
A is true but R is false
18%
A is false but R is true
Q3/10: The potential energy of a spring stretched by distance x is proportional to:
Anonymous Quiz
23%
x
43%
x^2
13%
x^3
21%
Square root of x
Q4/10: A body of mass m is moving in a circle of radius r with a constant speed v. What is the work done by the centripetal force in moving the body over half the circumference?
Anonymous Quiz
19%
(mv^2/r) * pi * r
37%
Zero
42%
mv^2/r
0%
mv^2
Q5/10: The area under a force-displacement graph represents:
Anonymous Quiz
9%
Power
29%
Momentum
54%
Work done
9%
Impulse
Q6/10: A 50 kg girl is on a swing. She is 1 m above the ground at the lowest point and 2 m above at the highest point. Her maximum speed is: (g = 10 m/s^2)
Anonymous Quiz
8%
2.2 m/s
43%
4.5 m/s
30%
6.3 m/s
18%
10.0 m/s
Q7/10: Which of the following forces is conservative?
Anonymous Quiz
33%
Frictional force
21%
Air resistance
43%
Gravitational force
0%
Viscous force