# Physics MCQs for Class 9 with Answers Chapter 4

#### Physics MCQs for Class 9 with Answers

The value of g increases with the :
Increase in the mass of the body
Increase in altitude
Decrease in altitude
None of the above

The Mars has value of g
25.94 m/sec2
3.73 m/sec2
1.62 m/sec2
8.87 m/sec2

The unit of gravitational constnat is:
Nm2 kg
Nm2kg-2
Nm2kg-1
N – m2

The value of g at a height one Earth’s radius above the surface of the Earth is
2 g
1/2 g
1/3 g
1/4 g

Value of g increases with the:
Increase in mass of the body
Increases in altitude
decrease the altitude
None of the above

The value of gravitational constant “G” is Nm2 kg-2
6.67 x 10-21
6.67 x 10-11
6.67 x 10-23
6.67 x 1011

At the surface of the earth value of ‘g’ is measured by using formula:
g=GMe/R
g = GMe/R2
g = 2GMe/R2
g = GMe/2 R

Orbital velocity vo =
√gR
√RG
gR
gR2

Magnetic force is an example of :
Action at a distance
Force
Torque
Nil

the value of gravitational field strength near the earth is ________ Nkg-1.
1.62
100
10
160

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