Please answer..

Question

An object at rest starts moving. It covers a distance of 2m in one second. It covers a further distance of 5 m in two seconds in the same direction. What is its average velocity and acceleration?

Answer 1

d = a·t²/2   where:

• d = distance = 2 m + 5 m = 7 m
• a = acceleration
• t = time = 1 sec + 2 sec = 3 sec

 

7 = a·3²/2

14 = 9a

14/9 m/s² = a

 

v = d/t

• v = velocity
• d = distance = 7 m
• t = time = 3 s

 

v = d/t

v = (7 m)/(3 s) = 7/3 m/s