Student Login

Home›Chapters›Laws of Motion PYQs›Inertia, First & Second Laws›Question 15

JEE Main 2023 (29 Jan, Shift 2) · Inertia, First & Second Laws

Inertia, First & Second Laws question from JEE Main 2023 (29 Jan, Shift 2)

Q15JEE Main 2023 · 29 JAN · SHIFT 2Medium

Inertia, First & Second Laws

A force acts for 20 s on a body of mass 20 kg, starting from rest, after which the force ceases and then body describes 50 m in the next 10 s. The value of force will be:

Show answer and solution

Answer: (c)

After the force stops, speed is constant: $v = \frac{50}{10} = 5\text{ m/s}$ .
This speed was gained in 20 s from rest: $a = \frac{5}{20} = 0.25\text{ m/s}^2$
$F = ma = 20 \times 0.25 = 5\text{ N}$ . So the answer is (c) 5 N.

Report a mistake

More questions on Inertia, First & Second Laws

A body of mass 500 g moves along x -axis such that its velocity varies with displacement…JEE Main 2023 (11 Apr, Shift 2)
At any instant the velocity of a particle of mass 500 g is (2ti + 3t²j) m s⁻¹. If the…JEE Main 2023 (8 Apr, Shift 1)
A force on an object of mass 100 g is (10i + 5j) N. The position of that object at t = 2…JEE Main 2022 (25 Jun, Shift 1)
An object of mass 5 kg is thrown vertically upwards from the ground. The air resistance…JEE Main 2022 (24 Jun, Shift 2)
A bullet of mass 0.1 kg is fired on a wooden block to pierce through it, but it stops…JEE Main 2021 (18 Mar, Shift 1)
An object of mass 'm' is being moved with a constant velocity under the action of an…JEE Main 2021 (1 Sep, Shift 2)
A force F = (40i + 10j) N acts on a body of mass 5 kg. If the body starts from rest, its…JEE Main 2021 (25 Jul, Shift 2)
A body of mass 2 kg moves under a force of (2i + 3j + 5k) N. It starts from rest and was…JEE Main 2021 (16 Mar, Shift 2)