Gravitation (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 5 - 7 of 7

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Question number: 5

» Gravitation » Energy

Appeared in Year: 2015

MCQ▾

Question

An object is propelled vertically to a maximum height of 4R from the surface of a planet of radius R and mass M. The speed of object when it returns to the surface of the planet is,

Choices

Choice (4) Response

a.

GM5R

b.

22GM5R

c.

GM2R

d.

3GM2R

Question number: 6

» Gravitation » Gravitational Potential

MCQ▾

Question

Two masses m1 = 10 kg and m2 = 810 kg are held 2 m apart. At a point P on the line joining them is the gravitational field equal to zero. The gravitational potential at that point is –

Choices

Choice (4) Response

a.

3.33×108Jkg1

b.

3.33×1011Jkg1

c.

6.67×108Jkg1

d.

6.67×1011Jkg1

Question number: 7

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

A hanging wire is 170 cm long having a bob of 1.50 kg. It shows a time period of 1.35 s on a Planet Newtonia. If the circumference of Newtonia is 5.16×107m , find the mass of the planet.

Choices

Choice (4) Response

a.

3.72×1025kg

b.

3.15×1025kg

c.

9.25×1024kg

d.

3.22×1024kg

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