BITSAT Physics: Questions 19 - 21 of 313

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Question number: 19

» Work, Energy and Power » Conservation of Mechanical Energy

MCQ▾

Question

A simple pendulum with a bob of mass m oscillates from A to C and back to A such that PB is H. If the acceleration due to gravity is g , then the velocity of the bob as it passes through B is –

Sector c Sector c: CircularSector [A, B, C] Segment f Segment f: Segment [D, E] Point A A = (2.14, 1.74) Point A A = (2.14, 1.74) Point B B = (-0.86, 1.7) Point B B = (-0.86, 1.7) Point C C = (5.18, 1.72) Point C C = (5.18, 1.72) Point D Point D: Point on cPoint D Point D: Point on cPoint E E = (2.14, 3.64) Point E E = (2.14, 3.64) A text1 = “A”B text1_1 = “B”C text1_2 = “C”P text1_3 = “P”H text1_4 = “H”

a Simple Pendulum Oscillate From A to C

In figure a simple pendulum with a bob of mass m oscillates from A to C is shown.

Choices

Choice (4) Response

a.

zero

b.

2gH

c.

mgH

d.

2gH

Question number: 20

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

If n small balls, each of mass m impringe elastically each second on a surface with a velocity u , then the force experienced by the surface in one second will be –

Choices

Choice (4) Response

a.

0.5mnu

b.

4mnu

c.

2mnu

d.

1mnu

Question number: 21

» Oscillations and Waves » Speed of a Wave

MCQ▾

Question

The Laplace correction was necessary to Newton’s calculation of velocity of sound, because travel of sound in a medium is –

Choices

Choice (4) Response

a.

Isochoric process

b.

Adiabatic process

c.

Isobaric process

d.

Isothermal process

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