Question

A hydrogen balloon is flying eastward with speed 12ms^-1.when wind starts blowing from north to south with the speed 5ms-1 ,what is the resultant velocity of ballon?

Answer 1

This question is testing the concept of resultant magnitude of perpendicular forces.

In this case, the wind and the balloon are moving perpendicular to each other.

This forms a right angled triangle with a base 12m/s and a height of 5m/s.

The resultant velocity is the hypotenuse of the formed triangle.

We get this by Pythagoras theorem.

It is thus given by :

12² + 5² = 169

√169 = 13m/s

This is the resultant velocity.

Answer 2

Answer:

The answer is 13m/s