A HIGH SPEED TRAIN IS 180M LONG AND IT IS TRAVELLING AT 50M/S. HOW LONG WILL IT TAKE TO PASS A PERSON STANDING AT A LEVEL CROSSING? B-HOW LONG WILL IT TAKE TO PASS COMPLETELY THROUGH A STATION WHOSE PLATFORMS ARE 220M IN LENGTH?

a. Time = 3.6 seconds

b. Time = 4.4 seconds

Explanation:

Given the following data;

Distance = 180 m

Speed = 50 m/s

a. To find the time;

Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.

Mathematically, speed is given by the formula;

Making time the subject of formula, we have;

Substituting into the equation, we have;

Time = 3.6 seconds

b. Distance = 220 meters

Speed = 50 m/s

To find the time;

Substituting into the equation, we have;

Time = 4.4 seconds

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement