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BITSAT 2019 Physics Mechanics Revision Quiz 2

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Question 1

Four particles each of mass M, are orbiting in a circle of radius R in the same sense of rotation due to their mutual gravitational force of attraction. The time period of revolution is

Question 2

A swimmer’s speed in the direction of flow of river is 16 km h^–1. Against the direction of flow of river, the swimmer’s speed is 8 km h^–1. Calculate the swimmer’s speed in still water and the velocity of flow of the river.

Question 3

A container of large surface area is filled with liquid of density ρ. A cubical block of side edge a and mass M is floating in it with four-fifth of its volume submerged. If a coin of mass m is placed gently on the top surface of the block is just submerged. M is

Question 4

Find the ratio of time periods of two identical springs if they are first joined in series & then in parallel & a mass m is suspended from them

Question 5

The temperature of a metal coin is increased by 100

and its diameter increases by 0.15%. Its area increase by nearly

Question 6

Two-point masses of mass m₁ = fM and m₂ = (1 - f)M(f < 1) are in outer space (far from gravitational influence of other objects) at a distance R from each other. They move in circular orbits about their centre of mass with angular velocities ω₁ for m₁ and ω₂ for m₂. In that case

Question 7

The bob of a pendulum of length L is pulled a side from its equilibrium position through an angle

and then released. The bob will, then pass through its equilibrium position with a speed v, where v equals to

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Dec 10JEE & BITSAT