Why are the soles of the shoes treaded?
To decrease friction
To increase friction
To increase life of the shoes
To give the shoes more protection
The change in seasons on the earth occurs because
the axis of rotation of the earth is tilted with respect to the plane of its orbit
the distance between the earth and the sun is not constant
the axis of rotation of the earth is parallel to the plane of its orbit
the axis of rotation of the earth is perpendicular to the plane of its orbit
If the frequency of a simple pendulum is 2 Hz, how many oscillations will it complete in 16s?
16
64
32
8
Which of the following is/are example(s)of non-contact force?
Muscular force
Gravitation force
Magnetic force
Both (A) and (B)
Which of the following properties of water can be used to explain the spherical shape of rain droplets?
Surface tension
Critical phenomenon
Viscosity
Pressure.
Which one of the following is a renewable resource of energy?
Petroleum
Groundwater
Natural gas
Coal
Which physical unit is obtained by the ratio of momentum and velocity of matter?
Acceleration
Mass
Velocity
Force
B.
Mass