Question

In a car race, in a very busy road, a skilled driver has managed to drive his car with uniform velocity of5 ms' for 10 minutesAverage velocity of car in first 5 minutes

Answer 1

as velocity is constant..

so average velocity =5 ms^1

Answer 2

The car drives for 10 minutes with uniform velocity of 5m/s.

Time t = 10 minutes = 10 × 60 seconds = 600 seconds.

Now, We can say,

Distance traveled = Speed * Time

Distance traveled in 10 minutes = 5 * 600 m = 3000m.

\sf Average \: \: speed = \large \frac{ Distance }{Time }Averagespeed=

Time

Distance

Since it's uniform motion, We can conclude Average velocity = Uniform velocity.

Now, Distance traveled in 2 minutes = 5 * 120 m = 600 m.

Average speed = 600 ÷ 120 = 5m/s.

One thing to note is

When we say a body is in uniform motion, It's instantaneous speed = average speed = uniform speed.

And Since, In the current question, The driver maintained a uniform speed till 10 minutes, Average speed = 5m/s ( = Uniform speed).

Taking any interval less than 10 minutes, gives you the same average speed.