Question

write a letter to the municipal corporation complaining about the scarcity of street lights in your area

Answer 1

Explanation:

A body moving along a straight line at 20 metre per second undergoes an acceleration of -4 metre per second square after 2 seconds it's speed will be

Answer 2

Answer:

Given u=20m/s

a=-4m/s²

t= 2sec

v=?

So we use first equation of motion:-

v=u+at

v= 20+4×2

v=20+8

v=28m/s