Question

A particle is moving eastward with a velocity of 5m/s in 10s the velocity changes to 5m/s

Answer 1

ANSWER

Initial velocity, u=5m/s eastwards

Final velocity, v=5m/s northwards

Now, change in the velocity ∣△v∣=

v

2

+u

2

=

5

2

+5

2

=5

2

And the direction of △v is given by

tanθ=

u

v

=

5

−5

=−1 (taking east direction as positive)

θ=−

4

π

Now, acceleration a=

t

△v

=

10

5

2

=

2

1

m/s

2

in north-west direction.