Question

a car moving at a constant speed of 36 km per hour moves with North words for 20 minutes then due to West with the same speed for 25 by 3 minutes what is the average velocity of the car during this run in kmph​

Answer 1

Answer:

I do

Explanation:

Answer 2

Answer:

Explanation:

=> Here, a car moving at a constant speed of 36 kmph moves north wards for 20 minutes.

Speed = 36 km / h

Time, t1 = 20 mins = 20/60 hours = 1/3 hours (because 1 min = 1/60 hours)

Distance travelled towards north, S1 = Speed * time (t1)

= 36 km/h * 1/3 h

= 12 km

=> Car move towards west with the same speed for 8 * 1/3 minutes. Thus,

Speed = 36 km/h

Time, t2 = 8 * 1/3 = 25 / 3 minutes = 25 / 3 * 1/60 h = 25 / 180 h= 5/36 h

Distance travelled towards west, S2 = Speed (s) * time (t2)

= 36 * 5 / 36

= 5 km

Now, the average velocity of the car during this run:

V_avg = ΔS / Δt

= √ S1² + S2² / t1 + t2

=√(12)²+(5)²/(1/3+5/56)

= 13 * 36 / 17

= 27.5 km/h

Thus, the average velocity of the car during this run is 27.5 km/h.