The velocity of freely falling object at the end of 8 seconds is
78. 4 m /s
58.8 m/s
39.2 m/s
76.6m/s
If the masses of both the object are doubled, the gravitational force of attraction is
Doubled
Halved
Becomes 4 times
Becomes (1/4)th
The fixed path in which the satellite moves round the planet is called
Circle
Orbit
Shell
radius
The weight of a body on the moon is one - sixth of its weight on the earth.How will the mass of the body vary ?
Becomes 1/6 th
Remains the same
Becomes 6 times
Becomes 1/8 th
The S.I unit of weight is
kg
N
N/kg
N/m
Examples of unstable equilibrium is
Walking on the road
Reading
Riding a cycle on the rope
Swimming
Satellites whose period of revolution is 24 hours are called
Geostationary satellites
Polar satellite
Equatorial satellite
Artificial satellite
Every object has a point where all its weight is considered to be concentrated, this point is called
Acceleration due to gravity
Midpoint
Gravitational force
Centre of gravity