1. | \(U > mgh\) |
2. | \(U < mgh\) |
3. | \(U = mgh\) |
4. | \(h,\) considered relative to the radius of the earth. | any of the above may be true depending on the value of
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo uniform solid spheres of equal radii \({R},\) but mass \({M}\) and \(4M\) have a centre to centre separation \(6R,\) as shown in the figure. The two spheres are held fixed. A projectile of mass \(m\) is projected from the surface of the sphere of mass \(M\) directly towards the centre of the second sphere. The expression for the minimum speed \(v\) of the projectile so that it reaches the surface of the second sphere is:
1. \(\left(\dfrac{3 {GM}}{5 {R}}\right)^{1 / 2}\)Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA rocket is fired vertically with a speed of \(5\) km/s from the earth’s surface. How far from the earth does the rocket go before returning to the earth?
1. \(8\times10^6\) m
2. \(1.6\times10^6\) m
3. \(6.4\times10^6\) m
4. \(12\times10^6\) m
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA body of mass \(m\) is taken from the Earth’s surface to the height equal to twice the radius \((R)\) of the Earth. The change in potential energy of the body will be:
1. | \(\frac{2}{3}mgR\) | 2. | \(3mgR\) |
3. | \(\frac{1}{3}mgR\) | 4. | \(2mgR\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA satellite of mass \(m\) is orbiting the earth (of radius \(R\)) at a height \(h\) from its surface. What is the total energy of the satellite in terms of \(g_0?\)
(\(g_0\) is the value of acceleration due to gravity at the earth's surface)
1. | \(\frac{mg_0R^2}{2(R+h)}\) | 2. | \(-\frac{mg_0R^2}{2(R+h)}\) |
3. | \(\frac{2mg_0R^2}{(R+h)}\) | 4. | \(-\frac{2mg_0R^2}{(R+h)}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology