a car travels from stop A to B with the speed of 30 km per hour and then returns back to a with a speed of 50 km per hour find the displacement of the car
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average speed =total distance /time
let the distance travelled from A to B= x km
then,
total distance travelled = 2x km
time while going from A to B = D/S
=x/30 hours
time while returning = x/50 hours
total time = x/30 + x/50
=5x+ 3x/150
=8x/150
=4x/75 hours
average speed = 2x x 75
4x
37.5 km/hr
Hope This Helps :)
maitreyi3:
displacement?
Since the car returns back to it's original position, hence displacement = 0
ok
Just gave some extra info for the question ;)
'Coz mostly all this information is asked in the question.
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