A car is moving with speed 30 m. Due to application of brakes it travels 30 m before stopping.

Name: Problem 230, Chapter 2: JEE Physics
Uploaded: 2022-01-03T12:37:57-08:00
Duration: 2 min 46 s
Channel: Muhammad Nawaz
Description: A car is moving with speed 30 m. Due to application of brakes it travels 30 m before stopping. Find its acceleration. (A) 15 m / s^2 (B) -15 m / s^2 (C) 30 m / s^2 (D) 10 m / s^2

step 1 Hello students, our question is a car is moving with speed 30 meters per second. Due to applicat

Question

A car is moving with speed $30 \mathrm{~m}$. Due to application of brakes it travels $30 \mathrm{~m}$ before stopping. Find its acceleration. (A) $15 \mathrm{~m} / \mathrm{s}^{2}$ (B) $-15 \mathrm{~m} / \mathrm{s}^{2}$ (C) $30 \mathrm{~m} / \mathrm{s}^{2}$ (D) $10 \mathrm{~m} / \mathrm{s}^{2}$

    A car is moving with speed $30 \mathrm{~m}$. Due to application of brakes it travels $30 \mathrm{~m}$ before stopping. Find its acceleration.
(A) $15 \mathrm{~m} / \mathrm{s}^{2}$
(B) $-15 \mathrm{~m} / \mathrm{s}^{2}$
(C) $30 \mathrm{~m} / \mathrm{s}^{2}$
(D) $10 \mathrm{~m} / \mathrm{s}^{2}$

JEE Physics

StemEZ 1st Edition

Chapter 2, Problem 230

Instant Answer

Solved by Expert Muhammad Nawaz

01/03/2022

Step 1

The initial speed of the car (u) is 30 m/s, the final speed (v) is 0 m/s (since the car stops), and the distance traveled (s) is 30 m. Show more…

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A car is moving with speed $30 \mathrm{~m}$. Due to application of brakes it travels $30 \mathrm{~m}$ before stopping. Find its acceleration. (A) $15 \mathrm{~m} / \mathrm{s}^{2}$ (B) $-15 \mathrm{~m} / \mathrm{s}^{2}$ (C) $30 \mathrm{~m} / \mathrm{s}^{2}$ (D) $10 \mathrm{~m} / \mathrm{s}^{2}$

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Key Concepts

Uniformly Accelerated Motion

Uniformly accelerated motion describes motion in which the acceleration is constant over time. The kinematic equations, such as v² = u² + 2as, relate displacement, initial velocity, final velocity, and acceleration, and are crucial for solving problems in this area.

Kinematic Variables

Kinematic variables include initial velocity, final velocity, displacement, time, and acceleration. Identifying these variables allows one to select and apply the relevant kinematic equation to solve for any unknowns in motion problems.

Acceleration and Deceleration

Acceleration is the rate of change of velocity over time. When an object slows down, it experiences deceleration, which is simply acceleration that has a negative value relative to its direction of motion. Recognizing the sign of acceleration is important when interpreting motion scenarios such as braking.

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