S.I unit of gravitation constant 'G' is
Nm2 kg2
Nm2/kg2
N/m2 kg2
N/m2 kg-2
Who gave three laws of planetary motion?
Newton
Kepler
Einstein
Galileo
A ball is thrown up with a speed of 15 m/s.How high will it go before it begins to fall? (g = 9.8 m/s2)
13.4 m
12.4 m
11.4 m
14.5 m
According to Kepler's Laws of Planetary Motion :
r2 α T3
r α T2
r3 α T2
r3 α 1/ T2
The earth's gravitational force causes an acceleration of 5m/s2 in a 1 kg mass somewhere in space.How much will the acceleration of a 3kg mass be at the same place?
15 m/s2
10 m/s2
5 m/s2
3 m/s2
Two protons are kept at a separation of 1 femtometre (1 femtometre = 10-15 m ).The mass of a proton is 1.67 x 10-27 kg.The gravitational force between them is :
1.86 x 10-34 N
5.86 X 10-34 N
2.8 X 10-34 N
4.86 X 10-34 N
If the masses of both the object are doubled, the gravitational force of attraction is
Doubled
Halved
Becomes 4times
Becomes (1/4)th
S.I unit of pressure is
pascal
torr
tesla
bar
If the distance between two objects is halved ,then the gravitational force of attraction is
4 times
Becomes(1/4)th
The mass of a body is measured to be 12kg on earth. If it is taken to moon, the mass will be:
72kg
2kg
12kg
24kg
