Question

On a horizontal flat ground a person is standing at a point a at this point he installs 5m long pole vertically. Now he moves 5m towards east and then 2m towards north and reaches at point b. There be installed another 3m long vertical pole. A bird flies from the top of the first pole to the top of second pile. Find the displacement and magnitude of the displacement of the bird

Answer 1

Answer:

√33m towards North-East

Answer 2

Answer:

The displacement of the bird is 5i+2j-2k and the magnitude of the bird is √33.

Explanation:

Let the pole installed be PQ=5m

Let the pole installed at point B be AB=3m

To find: Displacement and magnitude of the bird=?

Solution:
AB→=5k

PB=PQ+AB

=5i+2j+3k

Whereas, PQ→=5i+2j+3k-5K

Therefore, the displacement of the bird is 5i+2j-2k

The magnitude is given by

√5²+2²+2²

=√33

Therefore, the magnitude of the bird is √33.