Question

A train is moving with a velocity of 45km/hr.Calculate the distance traveled by it in 1 he, 1minute, 1second

Answer 1

speed=45km/hr=45000/3600 m/sec =25/2 m/sec = 12.5 m/sec
now...
dist. = speed*time
for 1hr i.e. 3600 sec
d=12.5*3600=45000m=45km
for 1min i.e. 60sec
d=12.5*60=750m=0.75km
for 1sec
d=12.5*1=12.5m

hope this helps:p

Answer 2

First case:

Speed = 45 km/hr.

Time = 1 hr.

Distance = speed x time.

= 45 x 1.

= 45 km ( 45000 m).

Therefore, the train travels 45 km in 1 hour.

Second case:

Speed = 45 km/hr or we can also take as,

45000 m/ 60 min.

Time = 1 min.

Distance = speed x time.

=( 45000/60 ) x 1.

= 45000 / 60.

= 750 metres.

Therefore, the train travels 750 m in 1 minute.

Third case:

Speed = 45000 m/ 60 min (or ).

45000 m/ 3600sec.

Time = 1 second.

Distance = speed x time.

= (45000 / 3600) x 1.

= 45000 / 3600.

= 12.5 metres

Therefore, the train travels 12.5 m in 1 second.

What is distance traveled per unit time?

• Distance travelled per unit time by an object is called the speed of the object.
• S.I. unit of speed is metre per second (ms−1).

What is distance Travelled?

• Distance is the total movement of an object without any regard to direction.
• We can define distance as to how much ground an object has covered despite its starting or ending point.
• Distance = Length of the path I (ACB) Distance is a scalar quantity.

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