Physics (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 7 - 9 of 73

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Question number: 7

» Physics » Motion and Force

Appeared in Year: 2013

MCQ▾

Question

The figure below shows the position of a ball at t = 0, t = 1 s, t = 2 s, t = 3 s and t = 4 s

A position vs time graph of a ball

A Position vs Time Graph of a Ball

A ball change its position at five different times

Which of the graph below is a possible graph of the position x (t)?

Choices

Choice (4) Response

a.

A position vs time graph of a ball - Choice A

A Position vs Time Graph of a Ball - Choice A

A ball change its position at five different times

b.

A position vs time graph of a ball - Choice B

A Position vs Time Graph of a Ball - Choice B

A ball change its position at five different times

c.

A position vs time graph of a ball - Choice C

A Position vs Time Graph of a Ball - Choice C

A ball change its position at five different times

d.

A position vs time graph of a ball - Choice D

A Position vs Time Graph of a Ball - Choice D

A ball change its position at five different times

Question number: 8

» Physics » Work and Energy

Appeared in Year: 2013

MCQ▾

Question

A geo-stationary satellite is orbiting around earth at height of 30,000 km in circular orbit. The radius of the earth is taken as 6000 km. The geo-stationary satellite comes back to its position after one revolution in exacity 24 h. Let the acceleration due to gravity (g) be 10 m/s 2 and mass of satellite be 1000 kg, calculate the work done in 12 h when moving under gravitational force.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 9

» Physics » Measurement

Appeared in Year: 2013

MCQ▾

Question

A hypothetical planet has density . radius R, and surface gravitational acceleration g. If the radius of the planet was doubled, but the planetary density stayed the same, the acceleration due to gravity at the planet’s surface would be:

Choices

Choice (4) Response

a.

4g

b.

g/2

c.

g

d.

2g

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