Question

viii) A train is moving eastward at 10 m/sec. A
waiter is walking eastward at 1.2m/sec;
and a fly is flying towards the north across
the waiter's tray at 2 m/s. What is the
velocity of the fly relative to Earth​

Answer 1

Answer:

Explanation:

Given,

Speed of train = 10 m/s east

Speed of waiter = 1.2 m/s east

Speed of tray = 2 m/s north

To Find,

Velocity of the fly relative to Earth​.

Formula to be used,

Pythagorean theorem,

Solution,

Here, we will consider,

v(z) = Velocity of the fly

v(e) = Velocity of the east

v(n) = Velocity of the north

So, Putting all the values, we get

v(z) = √[{v(e)}² + {v(n)}²]

⇒ v(z) = √[(10 + 1.2)² + (2²)]

⇒ v(z) = √[(11.2)² + (2)²]

⇒ v(z) = 11.3 m/s

Hence, the velocity of the fly relative to Earth​ is 11.3 m/s.