Physics, asked by mohdkashif1172006, 11 months ago

Suppose a train travels 120km in 1hr . Is the train moving in uniform motion ?

Answers

Answered by unlikelylikeable
0

Answer:

Yes it is, this is because the train's speed is constant.

Answered by pmahato033gmailcom
0

Answer:

11th

Physics

Motion in a Straight Line

Speed and Velocity

On a 120 km track, a train ...

PHYSICS

On a 120 km track, a train travels the first 30 km with a uniform speed of 30 km/h. How fast must the train travel the next 90 km so as to average 60 km/h for the entire trip?

December 20, 2019avatar

Smarita Bhargava

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ANSWER

Average speed=Total distance Total time taken

V

av

=

t

d

ort=

V

av

d

For 120 km,

t=

60 km/hr

120 km

=2 hr ......(i)

For 1st 30 km,

t

1

=

30 km/hr

30 km

=1 hr

For remaining 90 km,

t

2

=t−t

1

=2−1=1 hr

speed=

time

distance

or v

2

=

t

2

d

2

=

1

90

=90 km/hr

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