Mathematical Problem 2.1 From My Physics Book.

Level 1

Velocity of a car increases uniformly from 5m/s and after 10s becomes 45m/s . What is the acceleration of the car in m/s^2 ?


The answer is 4.

Raiyun Razeen by Raiyun Razeen , 22, Bangladesh

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2 solutions

Raiyun Razeen
Feb 5, 2014

Here, initial velocity u =5ms-1 final velocity v =45ms-1 time t =10s ∴acceleration a =?

We know, a=v–u/t

or, a =45ms-1 – 5ms-1/10s or, a =40ms-1/10s so, a = 4ms-2 Ans : 4ms-2

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It should be (v-u)/t

Mahir Farhan Khan - 7 years, 4 months ago

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You are right.

Raiyun Razeen - 7 years, 4 months ago
Krishna Karthik
Nov 21, 2018

v f = v i + a t v_f=v_i+at

v f = 45 v_f=45

v i = 5 v_i=5

t = 10 t=10

45 = 5 + 10 a 45=5+10a

a = 4 m / s 2 a=4m/s^2

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