Physics 1 Marks Question

Assume that an artificial satellite release a bomb.Would the bomb ever strike the earth if the effect of air resistance is neglected?

Does the escape velocity vary with mass?

What is the angle between the equatorial plane and the orbital plane of Geostationary satel lite?

A satellite is orbiting around the Earth with a speed v. To make the satellite escape, what is the minimum percentage increase in its speed?

Two artificial satellites, one of mass 400kg and another of mass 2500kg, are set in the same orbit around a planet. What is the ratio of their (i) orbital velocities, (ii) time periods?

What is the effect of non-sphericity of the earth on the value of 'g'?

What is the orbital velocity for a satellite orbiting close to the surface of earth?

A mass thrown up returns to the surface of earth. What is the nature of total energy possessed?

What do you mean by a parking orbit of a satellite?

When will the Kepler's law be applicable on the planets?

A satellite revolving around earth loses height. How will its time period be changed?

How escape velocity is related to orbital velocity for orbits close to earth?

If the earth is regarded as a hollow sphere, then what is the weight of an object below surface of the earth?

A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant (a) linear speed, (b) angular speed, (c) angular momentum, (d) kinetic energy, (e) potential energy, (f) total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the Sun.

Gravitational force between two bodies at moon surface is _________ gravitational force on earth surface.

Acceleration produced in a freely falling body under the gravitational pull of earth is called __________.

Can we determine the mass of a satellite by measuring its time period?

What would happen to an artificial satellite, if its orbital velocity is slightly decreased due to some defects in it?

The value of G on the surface of earth is 6.67 10^-11 Nm² kg^-2. What is its value on the surface of the moon?

Relation between escape velocity v_e and orbital velocity v₀ is __________.

Two satellites are at different heights. Which would have greater velocity?

The energy required by a satellite to leave its orbit around the earth and escape to infinity is called its _________.

Work done in moving a particle round a closed path under the action of gravitation force is zero. Why?

Assume that the law of gravitation changes from inverse square to inverse cube. Does the angular momentum of a planet about the sun will remain constant?

Give the S.I. units of 'g' and 'G'.

A mass thrown up returns to the surface of earth. What is the nature of total energy possessed?

An artificial satellite is at a height of 36,500km above earth's surface. What is the work done by earth's gravitational force in keeping it in its orbit?

As a spacecraft moves from earth to moon, how does its weight vary?

What is the basis for the second Law of Kepler?

When a pendulum clock is taken to a mountain, it becomes slow. But a wrist watch controlled by a spring remains unaffected. Explain.

What is the gravitational potential at infinity?

Acceleration due to gravity decreases more rapidly _________ earth surface.

How earth retains most of the atmosphere?

Do the force of friction and other contact forces arise due to gravitational attraction? If not, then what is the origin of these forces?

What would happen if the force of gravity were to disappear suddenly?

Does the speed increase, decrease or remain constant when a planet comes closer to the sun?

The force of attraction between earth and any object lying on or near its surface is known as ­­__________.

Is it possible to put an artificial satellite in an orbit such a way that it always remains visible directly over New Delhi?

What is the angle between the equatorial plane and the orbital plane of Polar satel lite?

Is gravitational potential a scalar or a vector? Why?

Is it possible to put a satellite into its orbit by firing it from a huge sized gun?

Would we have more sugar to the kilogram at the pole or at the equator?

Name one factor on which the period of revolution of a planet around the Sun depends.

Time period of geostationary satellite around earth is _________.

A mass M is broken into two parts: m and (M - m). How is m related to M so that the gravitational force between two parts is maximum?

From where does a satellite revolving around a planet get the required centripetal force?

The masses of two bodies are doubled and the distance is halved, how will the gravitational force change?

Give the S.I. units of 'g' and 'G'.