Question

DATE
To
A train starting from rest attaining
so a velocity of 50 km/ hr in 10 min assuming
that the acceleration of is uniform find
(I)the acceleration
(ii)distance Travelled by the attaining
this
​

Answer 1

Step-by-step explanation:

Related Questions

A train starting from rest attains a velocity of 72km/h in 5 min. Assuming the acceleration is uniform; Find the acceleration and distance travelled by train for this velocity.



Answer

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Hint: Use the fact whenever a body starts moving from rest, the final velocity attained by that object is a multiplication of the uniform acceleration and time taken to achieve that final velocity. Use laws of motion to calculate the distance travelled.

Complete step-by-step answer:

Given,

Initial velocity

=u=0m/s=u=0m/s

Final velocity=V=72km/h=V=72km/h

Time=5min=5min

We will convert minutes into hours.

=560h=112h=560h=112h

We have to find out acceleration:

We will denote acceleration by a and distance travelled by s.

Formula used:

a=v−ut⇒a=72−0112⇒a=72×12=864km/h2a=v−ut⇒a=72−0112⇒a=72×12=864km/h2

Hence the acceleration is 864km/h2864km/h2.

Now, the distance travelled by train:

Formula used:

s=ut+12at2=0×112+12(864)