Question

A bird files 20 m towards East and them 15 m towards south then it's displacement travelled from the initial position is...​

Answer 1

The magnitude of the total velocity is

\displaystyle {v}_{\text{tot}}=\sqrt{{{v}_{x}}^{2}+{{v}_{y}}^{2}}v

tot

=√

v

x

2

+v

y

2

where

vx = v river = 1.20 m/s

and

vy = vboat = 0.750 m/s.

Thus,

\displaystyle {v}_{\text{tot}}=\sqrt{({1.20}\text{ m/s})^{2} + ({0.750}\text{ m/s})^{2}}v

tot

=√

(1.20 m/s)

2

+(0.750 m/s)

2

yielding

vtot = 1.42 m/s.

The direction of the total velocity θ is given by:

θ = tan−1(vy/vx) = tan−1 (0.750/1.20).

This equation gives

θ = 32.0º.

Answer 2

5m

Explanation:

------------------->

20m

<--------------

15m

20 -15 =5ms