a car moves with the speed of 40 km/hr for the first half distance and 60km//hr for second half distance. the average speeed of car is
Answers
Answer:
60+40/2=50km/hr
Explanation:
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11th
Physics
Motion in a Straight Line
Speed and Velocity
A car covers the first half...
PHYSICS
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Asked on January 17, 2020 by
Tiyasha Kosambia
A car covers the first half the distance between two places at 40 km/h another half at 60 km/h, the average speed of car
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ANSWER
Letx consider, x= total distance covered by the car,
Time taken to complete the half distance with velocity v=40km/h,
t
1
=
2×40
x
=
80
x
hr. . . . .(1)
The time taken to complete another half distance with velocity u=60km/h
t
2
=
2×60
x
=
120
x
hr
The total time taken, t=t
1
+t
2
t=
80
x
+
120
x
=
48
x
hr
The average speed of the car,
v
avg
=
x/48
x
=48km/h
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