Question

A Car increases its speed with uniform rate from 30km/hr to 70km/hr in 10 seconds.Find average speed of car.​

Answer 1

Explanation:

average speed = 27.7 m/s is the answer

Answer 2

Answer:

Explanation:

Given,

Initial Velocity(u) = 30km/hr

$=30\times \dfrac{5}{18}m/s$

$=\dfrac{150}{18}m/s$

= 8.33 m/s

Final Velocity(v) = 70 km/hr

$=70\times \dfrac{5}{18}m/s$

$=\dfrac{350}{18}m/s$

= 19.44 m/s

time (t) = 10s

To Find :-

Average Speed.

Formula Used :-

$Average Speed=\dfrac{u+v}{2}$

Solution :-

Average speed =

$=\dfrac{30+70}{2}km/hr$

$=\dfrac{100}{2}km/hr$

Average speed = 50 km/hr

(or)

Average speed =

$=\dfrac{8.33+19.44}{2}m/s$

$=\dfrac{27.77}{2}m/s$

= 13.885 m/s

Average Speed = 13.885 m/s

Know More :-

$1)S=\dfrac{d}{t}$

• s = speed
• d = distance
• t = time

$2)a=\dfrac{v-u}{t}$

• v = final Velocity
• a = acceleration
• u = initial velocity
• t = time