a train first for 30 min with a velocity 30 km h-1 and then for 40 min with a velocity of 40 km h-1in same direction ,calculate
i) the total distance travelled ii) The average velocity of the train. 4. The value of g remains the same at all places on the earth surface. Justify. 5. a bicycle initially moving with a velocity 10 ms-1 acceleration for 5 s at a rate of 2 ms-2. What will be its final velocity?
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11th
Physics
Motion in a Straight Line
Speed and Velocity
A train first travels for 3...
PHYSICS
A train first travels for 30 min with a velocity 30 kmh
−1
and then for 40 min with a velocity 40 kmh
−1
in the same direction, calculate the average velocity of the train.
A
35 kmh
−1
B
90 kmh
−1
C
35.71 kmh
−1
D
70 kmh
−1
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ANSWER
Total time of journey =t
1
+t
2
=
60
30+40
=
6
7
h
∴ Average velocity =
Total time of journey (t)
Total distance travelled (S)
=
(7/6)h
60
30
×30+
60
40
×40
=35.71 kmh
−1
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Answer:
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Explanation:
35.71 kmh-1
this the answer please make me as brainleast
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