Question

The velocity of a car changes from 10 m/s east to 30 m/s east in 4 seconds what is the acceleration of the car

Answer 1

a = 5 m/s²

Step-by-step explanation:

Acceleration is the rate of change of velocity. Acceleration can only occur if their is change in the velocity of an object. Acceleration is said to be the change of velocity with time. Acceleration can be represented mathematically as

a = Δvelocity/Δt = change in velocity/ change in time

From the equation acceleration means the difference between initial velocity and final velocity divided by the time required to change velocity.

let

a = acceleration

u = initial velocity

v = final velocity

t = time

therefore,

a = v - u/t

From the question

u = 10 m/s

v = 30 m/s

t = 4 secs

a = 30 - 10 / 4

a = 20/4

a = 5 m/s²

Answer 2

Answer: 5 m/s 2

To get the acceleration of a car, you need to know first the difference in the change in speed of a car then divided by time of the change. This can be expressed as acceleration = (change in speed) divided by (time for the change). So 30 m/s minus 10 m/s is equal to 20 m/s divided by 4 seconds and the quotient is 5 m/s2.