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# Class 10 Tuition Updates

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Discussion Asked on 25/09/2018

Particles of masses 2M, m and M are respectively at points A, B and C with AB = 1/2(BC). m is much-much... read more
Particles of masses 2M, m and M are respectively at points A, B and C with AB = 1/2(BC). m is much-much smaller than M and at time t = 0, they are all at rest as given in figure.
At subsequent times before any collision takes place. (a) m will remain at rest
(b) m will move towards M
(c) m will move towards 2M
(d) m will have oscillatory motion read less

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Asked on 25/09/2018

If the law of gravitation, instead of being inverse square law, becomes an inverse cube law(a) planets... read more
If the law of gravitation, instead of being inverse square law, becomes an inverse cube law
(a) planets will not have elliptic orbits
(b) circular orbits of planets is not possible
(c) projectile motion of a stone thrown by hand on the surface of the earth will be approximately parabolic
(d) there will be no gravitational force inside a spherical shell of uniform density read less

Answer

Asked on 25/09/2018

If the mass of the sun were ten times smaller and gravitational constant G were ten times larger in magnitude.... read more
If the mass of the sun were ten times smaller and gravitational constant G were ten times larger in magnitude. sun Then,
(a) walking on ground would become more difficult
(b) the acceleration due to gravity on the earth will not change
(c) raindrops will fall much faster
(d) airplanes will have to travel much faster read less

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Asked on 25/09/2018

What is the direction of a real velocity of the earth around the sun?

Answer

Asked on 25/09/2018

How is the gravitational force between two point masses affected when they are dipped in water keeping... read more
How is the gravitational force between two point masses affected when they are dipped in water keeping the separation between them the same? read less

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Asked on 25/09/2018

Is it possible for a body to have inertia but no weight?

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Asked on 25/09/2018

Show the nature of the following graph for a satellite orbiting the earth. (a) KE versus orbital radius... read more
Show the nature of the following graph for a satellite orbiting the earth.
(a) KE versus orbital radius R
(b) PE versus orbital radius R
(c) TE versus orbital radius R read less

Answer

Asked on 25/09/2018

Shown are several curves . Explain with reason, which ones amongst them can be possible trajectories... read more
Shown are several curves [Fig. (a), (b), (c), (d), (e) and (f)]. Explain with reason, which ones amongst them can be possible trajectories traced by a projectile (neglect air friction). read less

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Asked on 25/09/2018

An object of mass m is raised from the surface of the earth to a height equal to the radius of the earth,... read more
An object of mass m is raised from the surface of the earth to a height equal to the radius of the earth, that is, taken from a distance R to 2R from the centre of the earth. What is the gain in its potential energy? read less

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Asked on 25/09/2018

A mass m is placed at P a distance h along the normal through the centre O of a thin circular ring of... read more
A mass m is placed at P a distance h along the normal through the centre O of a thin circular ring of mass M and radius r (figure).
If the mass is moved further away such that OP becomes 2h, by what factor the force of gravitation will decrease, if h = r? read less

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