Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

Concepts Of Physics MCQ Edition [Volume 1]

Exam: Concepts Of Physics MCQ Edition [Volume 1]
Subject: Physics
Chapter: Newton's Laws of Motion

Concepts Of Physics MCQ Edition [Volume 1] · Physics · Newton's Laws of Motion

A block with a mass of 2 kg rests on a long frictionless horizontal...

A block with a mass of

2 \text{ kg}

rests on a long frictionless horizontal table and is pulled horizontally by a constant force

F

. The block is observed to travel

10 \text{ m}

during the first two seconds. Determine the magnitude of

F

.

Options

A $20 \text{ N}$
B $10 \text{ N}$
C $40 \text{ N}$
D $5 \text{ N}$

Correct answer

B. $10 \text{ N}$

Step-by-step solution

Given initial velocity

u = 0

, distance

s = 10 \text{ m}

, and time

t = 2 \text{ s}

.

Using the equation of motion

s = ut + \dfrac{1}{2}at^2

:

10 = 0 + \dfrac{1}{2}a(2)^2

10 = 2a \Rightarrow a = 5 \text{ m/s}^2

The force

F

is given by Newton's second law:

F = ma

F = 2 \times 5 = 10 \text{ N}

Practice Newton's Laws of Motion on Quantrex Academy →

More from Newton's Laws of Motion

A block of mass 0.2 kg is suspended from the ceiling by a light string. A second block of… Concepts Of Physics MCQ Edition [Volume 1]Placed on a smooth horizontal table, two blocks of equal mass m are connected by a light… Concepts Of Physics MCQ Edition [Volume 1]In a TV picture tube, electrons are emitted from the cathode with negligible speed and… Concepts Of Physics MCQ Edition [Volume 1]Travelling at 40 km/h , a car must be brought to a halt by applying brakes within the… Concepts Of Physics MCQ Edition [Volume 1]A particle of mass 50 g travels along a straight line. The variation of its speed with… Concepts Of Physics MCQ Edition [Volume 1]Two blocks A and B having masses m_A and m_B respectively are placed in contact on a… Concepts Of Physics MCQ Edition [Volume 1]Raindrops, each having a radius of 1 mm and a mass of 4 mg , are falling at a speed of 30… Concepts Of Physics MCQ Edition [Volume 1]A force F = -kx , where k = 15 N/m , acts on a particle of mass 0.3 kg . Determine the… Concepts Of Physics MCQ Edition [Volume 1] Full Newton's Laws of Motion list All Concepts Of Physics MCQ Edition [Volume 1] PYQs