Question

OTION IN A STRAIGHT LINE
If a body travels 30m in an interval of 2s and
50m in the next interval of 2s, then the
acceleration of the body is
1) 10 m/s? 2) 5 m/s 3) 20 m/s? 4) 25 m/s2
A bullet travelling horizontally looses 1/20th
of its velocity while piercing a wooden plank.
Then the number of such lanks required to​

Answer 1

Explanation:

see

the body/object is traveling 30m in 2 sec (first)

and in the other sec it is traveling 50m in 2sec

so formula of acceleration is (v-u/t)

so by putting value in it and by adding the total time 2-2=4sec

=50-20/4=5

and unit of acceleration is meter per second square

so the ans will be 5meter per second square

option 2 is correct