Physics Ke Matrak

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Physics Ke Matrak. We covered all the Physics Ke Matrak MCQs in this post for free so that you can practice well for the exam.

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Physics Ke Matrak Objective for Students

Why is weightlessness experienced while orbiting the Earth in spaceships?

(a) Inertia

(b) Acceleration

(c) Zero gravity

(d) Orbital motion

Option d - Orbital motion

Which one of the following statements is not correct?

(a) The weight of a body is different on different planets.

(b) The mass of a body on the Earth, on the moon, and in empty space is the same.

(c) Weightlessness of a body occurs when the gravitational forces acting on it are counter-balanced.

(d) The weight and mass of a body are equal at sea level on the surface of the earth.

Option d - The weight and mass of a body are equal at sea level on the surface of the earth

What is the earth's escape velocity?

(a) 2.8 km/s

(b) 5.6 km/s

(c) 11.2 km/s

(d) 14 km/s

Option c - 11.2 km/s

For a missile launched with a velocity less than the earth's escape velocity, the total energy is

(a) positive

(b) negative

(c) zero

(d) Either positive or negative

Option c - zero

There is no atmosphere on the moon because

(a) it is near to the earth.

(b) it receives light from the sun.

(c) it revolves around the earth.

(d) the escape velocity of gas molecules on it is less than the root mean square velocity here.

Option d - the escape velocity of gas molecules on it is less than the root mean square velocity here

The kinetic energy given to the body to protect it with the escape velocity is called

(a) escape energy

(b) potential energy

(c) orbital velocity

(d) None of these

Option a - escape energy

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