1
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

If the earth were to spin faster, acceleration due to gravity at the poles

A
increases
B
decreases
C
remains the same
D
depends on how fast it spins
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

The height at which the acceleration due to gravity becomes $$\frac{g}{16}$$ (where, g = acceleration due to gravity on the surface of the earth) in terms of R is, if R is the radius of earth.

A
$$2R$$
B
$$3R$$
C
$$\sqrt2R$$
D
$$\sqrt3R$$
3
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

The escape velocity of a projectile on the earth's surface is 11.2 km/s. A body is projected out with thrice this speed. The speed of the body far away from the earth will be

A
22.4 km/s
B
31.7 km/s
C
33.6 km/s
D
None of these
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Kepler's second law of planetary motion corresponds to

A
conservation of energy
B
conservation of angular momentum
C
conservation of linear momentum
D
conservation of mass
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