1
MHT CET 2021 24th September Morning Shift
+1
-0

The period of revolution of planet $$\mathrm{A}$$ around the sun is 8 times that of planet $$\mathrm{B}$$. How many times the distance of A from the sun is greater than that of B from the sun?

A
5 times
B
2 times
C
3 times
D
6 times
2
MHT CET 2021 23rd September Evening Shift
+1
-0

The time period of a satellite of earth is 5 hours. If the separation between the earth and the satellite will satellite is increased to four times the previous value, the new time period of the satellite will be

A
20 hours
B
40 hours
C
80 hours
D
10 hours
3
MHT CET 2021 23rd September Evening Shift
+1
-0

A body of mass 'M' and radius 'R', situated on the surface of the earth becomes weightless at its equator when the rotational kinetic energy of the earth reaches a critical value 'K'. The value of 'K' is given by [Assume the earth as a solid sphere, g = gravitational acceleration on the earth's surfacde]

A
$$\frac{1}{2} \mathrm{MgR}$$
B
$$\frac{1}{3} \mathrm{MgR}$$
C
$$\frac{1}{4} \mathrm{MgR}$$
D
$$\frac{1}{5} \mathrm{MgR}$$
4
MHT CET 2021 23th September Morning Shift
+1
-0

The mass of a spherical planet is 4 times the mass of the earth, but its radius (R) is same as that of the earth. How much work is done is lifting a body of mass 5 kg through a distance of 2 m on the planet ? (g = 10 ms$$^{-2}$$)

A
400 J
B
200 J
C
800 J
D
300 J
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