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Physics 9 Chapter 3 - Dynamics - 9
1.
Which law of motion states that “The magnitude of acceleration produced in the body is directly proportional to the net force acting on the body”?
a) Newton’s third law of motion
b) Newton’s second law of motion
c) Newton’s first law of motion
d) Newton’s fourth law of motion
2.
Which law of motion states that “The magnitude of acceleration produced in the body is inversely proportional to the mass of the body”?
a) Newton’s third law of motion
b) Newton’s second law of motion
c) Newton’s first law of motion
d) Newton’s fourth law of motion
3.
The magnitude of the acceleration produced in the body is directly proportional to the.................?
a) Area of the body
b) Mass of the body
c) Net force acting on the body
d) Initial force acting on the body
4.
The magnitude of the acceleration produced in the body is inversely proportional to the.................?
a) Area of the body
b) Net force acting on the body
c) Initial force acting on the body
d) Mass of the body
5.
Fill in the blank: F =........?
a) None of these
b) mg
2
c) ma
d) m
2
x a
6.
What is the formula of force?
a) F = ma
b) F = ma
2
c) F = m
2
a
d) F = ma3
7.
What is the SI unit of force?
a) Metre per second per second
b) Metre per second
c) Newton
d) Kilogramme
8.
According to which law of motion: “1 N is the force that produces an acceleration of 1 ms
-2
in a body of mass1 kg”?
a) Newton’s third law of motion
b) Newton’s first law of motion
c) Newton’s second law of motion
d) Newton’s fourth law of motion
9.
How much is force that produces an acceleration of 1ms
-2
in a body of mass1 kg?
a) 1 N
b) 4 N
c) 2 N
d) 3 N
10.
In SI units, what is the value of ‘k’?
a) 1
b) 3
c) 0
d) 2
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