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Second Law of Motion

The formula a...

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The formula about acceleration of center of mass

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Q. the acceleration of the plank and the center of mass of the cylinder

Q. Find magnitude and direction of acceleration of center of mass of the system.?

Q. Choose the correct alternative :
(a) Acceleration due to gravity increases/decreases with increasing altitude.
(b) Acceleration due to gravity increases/decreases with increasing depth (assume the earth to be a sphere of uniform density).
(c) Acceleration due to gravity is independent of mass of the earth/mass of the body.
(d) The formula

- G M m (1 / r_{2} - 1 / r_{1})

is more/less accurate than the formula

m g (r_{2} - r_{1})

for the difference of potential energy between two points

r_{2}

r_{1}

distance away from the center of the earth.

Q. There are two particles of same mass. If one of the particles is at rest always and the other has an acceleration

¯ a

. Acceleration of center of mass is :

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