Question

a car increases its speed from 20 km/h to 50km/h in 10 sec what is its acceleration
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Answer 1

Final velocity, v = 50 km/h

Initial velocity, u = 20 km/h

Time taken, t = 10 sec

So the change in velocity can be calculated as

v−u=(50−20)km/hr

= 30 km/hr

On converting the units into m/s

We get,

= 30 km/hr ⇒30×1000/60×60⇒253 m/s

We know the acceleration formula,

a=(v−u)/t

Put the value of change in velocity and time in above formula

we get,

=25/3×1/10

=5/6 m/s²

Answer 2

Answer:

3m/s^2

Explanation:

initial velocity(u)=20m/s

final velocity(v)=50m/s

time(t)=10s

therefore,

a=(v-u)/t=(50-20)/10=30/10=3m/s^2