Math, asked by Anonymous, 9 months ago

A car is running at a rate of 20m/sec. Suddenly, the driver applies brakes and stops the car in 5 secs. Find the value of acceleration of the car.​

Answers

Answered by Anonymous
5

Given:

Speed of car = 20 m/s

The driver applies brakes & stops in 5s

To find:

Acceleration of the car

Solution:

Here , the final velocity will be = 0 m/s because the driver applies brakes

Using the kinematic equation

v² - u² = 2as

Where ,

v : final velocity

u : initial velocity

a : acceleration

s : distance travelled

→ 0 - 20 = 2(a)(5)

→ - 20 = 10a

→ a = -20/10

→ acceleration = - 2 m/s²

Note : -ve symbol indicates retardation

Hence , acceleration produced after applying brakes = - 2m/s²

Answered by llBestFriendsll
9

Given:

Speed of car = 20 m/s

The driver applies brakes & stops in 5s

To find:

Acceleration of the car

Solution:

Here , the final velocity will be = 0 m/s because the driver applies brakes

Using the kinematic equation

v² - u² = 2as

Where ,

v : final velocity

u : initial velocity

a : acceleration

s : distance travelled

→ 0 - 20 = 2(a)(5)

→ - 20 = 10a

→ a = -20/10

→ acceleration = - 2 m/s²

Note : -ve symbol indicates retardation

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