Question

A body moving with a constant acceleration travels the distance 3m and 8m respectively in 1s and 2s.
Calculate:
1) initial velocity
2) the acceleration of the body​

Answer 1

Using, s=ut+  

2

1

​  

at  

2

 

s  

1

​  

=u+  

2

1

​  

a

or, 3=u+  

2

a

​  

 

 ∴a=6−2u

s  

2

​  

=2u+  

2

1

​  

a×4

8=2u+2a

Solving the equations

8=2u+2(6−2u)

8=2u+12−4u  

2u=4  

u=2m/s

∴a=6−2u=6−4=2m/s  

2