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Question1

A 1.00-kg beaker containing 2.09 kg of oil (density = 916 kg/m3) rests on a scale. A 1.99-kg block of iron is incomplete from a spring scale and is completely submerged in oil. Find out the equilibrium readings of both scales.

Question2

A car has a top speed of 69 m/s (about 154 mi/h) and has wheels of radius 29 cm. If car starts from rest and reaches its operating speed after 7.2 s, what is an angular acceleration of the wheels? Imagine car accelerates uniformly.

Question3

Consider a solid homogeneous object taller than its broad, with top and bottom parallel. Prove that the shape with the least moment of inertia about an axis through object is a cylinder with the axis throughout its axis of symmetry.

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Category:- Physics
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