Question

2. A train starts from rest with a uniform
acceleration of 10 cm sec-2. Its velocity after one
minute is:
A. 60 m sec-1
B. 6 m sec-
C. 0.6 m sec-
D. 0.6 km sec-​

Answer 1

Answer:

(B) 6m/sec

Explanation:

A train starts from rest i.e the initial velocity is zero.

The acceleration of the train is 10 cm/s^2

Now we convert cm into m by dividing by 100

So the acceleration is 0.1m/s^2.

Now we use the equation of motion for a uniformly accelerating body i.e

v=u+at

Here u= initial velocity =0

v= final velocity ( we need to find)

a= acceleration = 0.1m/s^2

t=1 min = 60 secs

$v = 0 + 0.1 \times 60$

So, v=6m/s.