Question

driver decreases speed of a car from 25 metre per second to 10 metre per second in 5 second find the acceleration of the car ​

Answer 1

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Initial velocity of car=25 mps

Final velocity of car= 10 mps

Time taken= 5 sec

$acceleration = \frac{final \: velocity - initial \: velocity}{time \: taken} m \: {sec}^{ - 2} \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ a = \frac{10 - 25}{5} m \: {sec}^{ - 2} \\ \\ \\ \\ \\ \\ a = \frac{ - 15}{5} m \: {sec}^{ - 2} \\ \\ \\ \\ \\ a = - 3m \: {sec}^{ - 2}$

THANKS A LOT

Answer 2

Question

A driver decreasing the speed of a car from 25m/s to 10m/s in 5 second . find the acceleration of the car ?

Answer

Given,

• initial velocity of car (u) = 25m/s
• final velocity of car (V) = 10m/s
• time taken (t) = 5sec

What to find ?

• we have to find the acceleration of the car

Putting these values in the formula for acceleration ;

a=v-u/t

so we get ;

=> a= 10-25/5

=> a = -15/5

=> a = -3

so , the acceleration of car is -3m/s^2 .

• if it is a negative sign of acceleration it means that it is retardation.
• we can also set the car has a retardation of +3m/s^2