The stopping distance if the car is initially travelling at speed is .
Further Explanation:
The term motion is defined as the change in the position of the object with respect to the surrounding.
There are three main equations of motion also known as laws of constant acceleration because these <u>equations are valid only when the body has uniform acceleration.</u>
These equations used to find the variable like initial and final velocity, acceleration and time.
Let u is the initial velocity, is the final velocity, is the acceleration, is the distance and is the time.
The first equation of motion is:
…… (1)
The second equation of motion is:
…… (2)
The third equation of motion is:
…… (3)
Given:
The speed of the car is v and travel the distance d to stop after breaks applied.
The new speed at which car is traveling is .
Concept:
Apply the second equation of motion.
Case1:
The initial velocity of the car is , the final velocity of the car is , the distance covered by the car after break is applied is and the acceleration during break is .
Substitute for , for and for in equation (2).
Simplify further.
…… (4)
Case2:
The initial velocity of the car is , the final velocity of the car is , the distance covered by the car after break is applied is and the acceleration during break is .
Substitute for , for and for in equation (2).
Simplify further.
…… (5)
Divide equation (4) by equation (5).
Therefore, the stopping distance if the car is initially travelling at speed is .
Learn more:
1. Find the net force. https://brainly.in/question/8668644
2. Find the velocity. https://brainly.in/question/4502003
3. Calculate average speed brainly.com/question/11597590
Answer Details:
Grade: High school
Subject: Physics
Chapter: Kinematics
Keywords:
Car, travelling, speed v distance, d, stop, breaks, applied, stopping, distance, initially, traveling, 7.0v, acceleration, breaking, same, both case.