Question

a monkey is climbing up a tree at a speed of 3 metre per second. A dog runs towards the tree with a speed of 4 metre per second. What is the relative speed of the dog as seen by the monkey

Answer 1

This is a question on relative speed.

The two speeds are perpendicular to each other.

The two motions form a right angled triangle of base 4m/s and height 3m/s.

The relative speed is the hypotenuse speed of this motion.

We get the hypotenuse by pythagoras theorem.

Let the hypotenuse be c, the base be b and the height be a.

By Pythagoras theorem :

c² = a² + b²

c² = 3² + 4²

c² = 25

c = √25

c = 5

The relative speed is : 5 m/s

Answer 2

Answer:

answer of this question is 5m/s...