1
NEET 2018
+4
-1
The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are KA, KB and KC, respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then
A
KA < KB < KC
B
KA > KB > KC
C
KB < KA < KC
D
KB > KA > KC
2
NEET 2018
+4
-1
If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct?
A
Raindrops will fall faster.
B
Walking on the ground would become more difficult.
C
Time period of a simple pendulum on the Earth would decrease.
D
g on the Earth will not change.
3
NEET 2017
+4
-1
The acceleration due to gravity at a height at a height 1 km above the rearth is the same as at a depth d below the surface of earth. Then
A
d = 1 km
B
d = $${3 \over 2}$$ km
C
d = 2 km
D
d = $${1 \over 2}$$ km
4
NEET 2017
+4
-1
Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will
A
move towards each other.
B
move away from each other.
C
will become stationary.
D
keep floating at the same distance between them.
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