Physics, asked by narenms2018, 9 months ago

A train moving at a constant velocity of 54 kilometre per hour most East wards of 30 minutes then due to not with the same speed of 40 minutes what is the average velocity of the train during the run

Answers

Answered by jana07122002
2

Answer:

distance covered due east =54 km/hr × 1/2

hour=27km

distance covered due north =54km/hr × 4/6hr =36 km

displacement is the hypotenuse between starting and initial point =√27^2+36^2=45 km

total time =70 mins or 7/6 hrs avg velocity

=total displaceent, time =45×6/7=38.4 km /hr

so, since avg velocity is 38.4 km/hr

Answered by mjmasterscience
0

Answer:

Correct option is C)

Explanation:

Correct option is C)

We know that

According to question distance east west →speed×time

=54×

2

1

 hr

=27 km

distance north →54×

60

40

 hr

=

4

5

×

3

2

=36 km.

Net distance =

(36)

2

+(27)

2

=45 km

Avg. velocity =

total time

Total displacement

=

(30+40/60)

45

=

70/60

45

=

76

45×64

=38.4

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