Question

a 100 cm long train crosses a bridge 800 m in 50 sec with constant velocity, find the velocity​

Answer 1

Step-by-step explanation:

given :- 100 cm long

100+800= 900

velocity = distance / time

v= 900/50

v = 18m/s

i hope it helps... the question is wrong...that will be 100 m..

Answer 2

Appropriate Question:

A 100 m long train crosses a bridge 800 m in 50 sec with constant velocity, find the velocity.

Answer:

The velocity of the train is 18 m/s.

Given :

• A 100 m long train crosses a bridge 800 m.
• Time taken by the train to cross the bridge = 50 seconds with constant velocity.

To Find :

• The velocity of the train.

Solution :

Here, we are given that,

• Length of the train = 100 m
• Length of the bridge = 800 m
• Time taken = 50 seconds

So, we need to calculate the velocity of the train. In order to find the velocity, formula is given by :-

$\red{ \dag} \: \underline{\boxed{ \bf{Velocity = \dfrac{Total \: displacement}{Time \: taken }}}}$

Here, we will add both the lengths of train and the bridge and then after we'll have to divide it by time taken to cover the displacement.

$\dashrightarrow \: \: \bf \: Velocity_{(Train)} = \dfrac{100 \: m + 800 \: m}{50 \: s}$

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$\dashrightarrow \: \: \bf \: Velocity_{(Train)} = \cancel\dfrac{900 \: m}{50 \: s}$

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$\dashrightarrow \: \: \: \underline{ \boxed{ \bf{Velocity_{(Train)} = 18 \: m/s}}} \pink{ \bigstar}$

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$\therefore \sf\underline{The \: velocity \: of \: the \: train = \bf{18 \: m/s}}$

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Knowledge Bytes!

$\underline{ \sf{ \blue{Velocity}}} : -$

• Velocity is defined as the rate of change of displacement of an object.
• It is a vector quantity since it has both magnitude and a particular direction.
• The SI unit of velocity is m/s

• $\underline{ \boxed{ \sf{Velocity = \dfrac{Displacement}{Time} }}} \: \blue{ \star}$

$\underline{ \sf{ \blue{Displacement}}} : -$

• Displacement is the total distance covered by an object from its initial to its final position.