Question

A car travel from stop A to stop B with a speed of 30 km/h and then return back to A
with a speed 50 km/h
A) Displacement of car
B) Distance travel by the car
C) Average speed of car​

Answer 1

Answer:

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Answer 2

Answer:

A) displacement = 0

B) distance travelled = 80km

C) average speed of car = 40km/h

Explanation:

displacement is the overall change in direction of an object. since the car is travelling back and forth from stop A to B, there is no displacement.

distance = 30 × 1 + 50 × 1 = 80km

[in one hour, the car travelled 30km]

average speed = $\frac{total distance}{total time}$ = $\frac{80}{2}$ = 40km/h