Physics MCQs for Class 9 with Answers
The motion of a body about an axis is called
Circular motion
Rotatory motion
Vibratory motion
Random motion
The scientist who noticed that all the freely falling objects have same acceleration :
Newton
Galileo
Coulomb
Einstein
Thre radius of circle is doubled then centripetal acceleration becomes:
Doubled
Three times
Four times
Half time
If the mass of moving body in a circle is doubled then centripetal force will be:
Doubled
Half
4-times
Same
Independent quantities are taken on:
– x-axis
x-axis
-y- axis
y-axis
When the body is at rest its initial velocity will be:
Maximum
Minimum
Zero
All of these
Co-efficient of friction between wood and concrete.
0.62
0.8
1
0.9
The force which completes a body to move in circle is
Centripetal force
Centrifugal force
Perpendicular force
Tension
The value of gravitational acceleration when a body is moving in downward direction to:
10 ms-1
10 ms-2
10 m
-10 ms
Distance covered in unit time is called:
Speed
Velocity
Acceleration
Uniform velocity
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