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9th Class Physics Chapter 3 Dynamics English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
The Atwood machine can be used to find the acceleration due to gravity using the equation
Choose an answer
g = 2 (m1 x m2)/(m1 + m2) a
g = (m1 - m2)/(m1 + m2) a
g = (m1 + m2)/(m1 - m2) a
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Question # 2
The weight of body on earth with mass 8 kg is:
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10 N
100 N
80 N
8 N
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Question # 3
Friction causes _____________
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Heat
Light
Mass
Weight
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Question # 4
When a horse pulls a cart , the action is on the :
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Cart
Earth
Man
Earth & cart
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Question # 5
Which of the following relation is correct?
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F = m/a
F = m-a
F = ma
F = m + a
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Question # 6
Centripetal force always acts _________ to the motion:
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Opposite
Parallel
Perpendicular
Upward
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Question # 7
Walking on earth is the example of which law?
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First law
Second law
Third law
Law of momentum
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Question # 8
Co-efficient of friction between wood and concrete.
Choose an answer
0.63
0.8
1
0.9
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Question # 9
When horse pulls a cart, the action is on the:
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Cart
Earth
Horse
Earth and cart
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Question # 10
If radius of circle is doubled then centripetal acceleration becomes:
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Doubled
Three times
Four times
Half times
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Question # 11
The unit of momentum is :
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kgms
-1
kgms
-2
m sec
None
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Question # 12
The centripetal acceleration is always along.
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Normal force
Centripetal forces
Mass
Horizental forces
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Question # 13
Motion of the rocket is the example of which law?
Choose an answer
First law
Second law
Third law
Law of momentum
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