An elastic spherical ball of mass {m} and radius 'a', moving with speed {v}, strikes a fixed rough horizontal surface at an angle \\theta with normal. After striking it rebounds at an angle \ϕ with normal. If coefficient of friction is small enough to prevent skidding. Then which of the following may be correct.

change in angular speed is \frac{5 \\muv \cos \\theta}{a}

\tan \\theta=\tan \\theta-2 \\mu

change in angular speed is \frac{5 \\muv \cos \\theta}{7 a}

JEE Advanced 2021 Full Test 3 Paper 2

PART – I

Physics

SECTION – A (One or More than one correct type)
This section contains 06 multiple choice questions. Each question has FOUR options (A), (B), (C) and (D). ONE OR MORE THAN ONE of these four options is(are) correct.

Question : 4 of 54

Marks: +1, -0

An elastic spherical ball of mass m and radius 'a', moving with speed v, strikes a fixed rough horizontal surface at an angle θ with normal. After striking it rebounds at an angle ϕ with normal. If coefficient of friction is small enough to prevent skidding. Then which of the following may be correct.

tan‌ϕ=tan‌θ+2µ
change in angular speed is
5µv‌cos‌θ
a
tan‌θ=tan‌θ−2µ
change in angular speed is
5µv‌cos‌θ
7a

Validate

Go to Question:

Prev Question

Next Question