Question

A train is moving eastward at 10 m/sec. A waiter is walking eastward at 1.2 m/sec; and a fly is

charging toward the north across the waiter’s tray at 2 m/s. What is the velocity of the fly relative

to Earth?​

Answer 1

Answer:

The velocity of the fly tray relative to  earth is 11.3 m/s.

Explanation:

Given that,

Speed of train = 10 m/s eastward

Speed of waiter = 1.2 m/s east ward

Speed of tray = 2 m/s north

We need to calculate the velocity of the fly tray relative to earth

Using Pythagorean theorem

Where, = velocity in eastward

= velocity in north

Put the value into the formula

Hence, The velocity of the fly tray relative to  earth is 11.3 m/s

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