Question

a car moving over a straight path, covers a distance d with constant a
speed of 40km/h and then the same distance with speed 60km/h , the average speed of car is​

Answer 1

Answer:

Given :

▪ A car covers first half of total distance with speed 40kmph and second half of total distance with speed 60kmph.

To Find :

▪ Average speed of the car.

Concept :

✏ If body covers first half of total distance with speed v1 and second half of total distance with speed v2, then average speed of the body is given by

☞ (v)av = 2v1v2/v1+v2

✏ Average speed is defined as the ratio of total distance travelled to the total time taken.

✏ It is a scalar quantity.

Calculation :

→ (v)av = 2v1v2/v1+v2

→ (v)av = 2(40)(60)/(40+60)

→ (v)av = 4800/100

→ (v)av = 48kmph

Explanation:

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