Question

Physics Velocity and Acceleration WSIName1. Calculate the displacement of a bird that flies east at Sm/s for 30see and then turnsaround, instantaneously, and flies west at 6m/s for 10sec.#1

Answer 1

The velocity of the bird when it was flying eastwards, v₁=8 m/s

The time of flight of the bird when it was flying eastwards, t₁=30 s

The velocity of the bird when it was flying westwards, v₂= 6 m/s

Time of flight of the bird when it eas flying westwards, t₂10 s

The velocity of an object is given by,

$v=\frac{d}{t}$

Where d is the displacement of the object.

Thus the displacement of the object is,

$d=vt$

Therefore, the displacement of the bird when it was flying eastwards is,

$\begin{gathered} d_1=v_1\times t_1 \\ =8\times30 \\ =240\text{ m} \end{gathered}$

And the displacement of the bird when it was flying towards the west is,

$\begin{gathered} d_2=v_2\times t_2 \\ =6\times10 \\ =60\text{ m} \end{gathered}$

Therefore total displacement of the bird can be calculated as,

$D=d_1-d_2$

On substituting the known values,

$D=240-60=180\text{ m}$

Therefore the displacement of the bird is 180 m