Question

a train is running at a constant speed of 36 km per hour Express its speed in metre per second

Answer 1

To convert km/h into m/s, we need to change 'km' to 'm" and 'hour' to 'sec'

$1 \: {kmh}^{ - 1} = \frac{1000 \: m}{3600 \: s} = \frac{5}{18} \: {ms}^{ - 1}$

Q. A train is running at a constant speed of 36 km per hour Express its speed in metre per second.

Solution :

$36 \: km {h}^{ - 1} \: = 36 \times \frac{5}{18} = 10m {s}^{ - 1}$



Hence, the speed of the train is 10 metre per second.

Answer 2

Answer:

Speed of train in km/h = 36 km/h

Speed of train in m/s = ?

$speed \: \: = \: \frac{distance}{time}$

$36 \: km \: { h}^{ - 1 } = \frac{36 \: km}{1h}$

$= \frac{36 \times 1000m}{60 \times 60s}$

$= 10 \: ms {}^{ - 1}$

Therefore, Speed of train in m/s = 10 m/s

Explanation:

• For a moving body, speed is the quantity by which we know how fast the body is moving.

• By speed we do not know in which direction the body is moving.

• The speed of a body is the rate of change of distance with time.

• Numerically it is the distance travelled by the body in one second.

• It is a scalar quantity.

• It is generally represented by the letter u and v.