Question

The velocity of a moving object increases from 15 km/ h to 30km/h in 5 sec. How much disstance travelled by the object in this time period?

I need it pls ​

Answer 1

Answer:

31.25 m

Explanation:

initial velocity(u)=15km/h

                            =4.17m/s(15*5/18, to convert to m/s)

final velocity(v)=30km/h

                          =8.33m/s(30*5/18)

time(t)=5 s

We know, s = u*t + (1/2)*a*(t^2)

                    = 4.17*5 + (1/2)*{(8.33-4.17)/5}*(5^2)

                    = 20.85 + (1/2)*(4.16/5)*25

                    = 20.85 + 10.40

                    = 31.25 m