Question

a particle is moving in a circle of radius r with constant speed v the magnitude of change in velocity moving from p to q is​

Answer 1

question

a particle is moving in a circle of radius r with constant speed v the magnitude of change in velocity moving from p to q is

*Answer* : B

Explanation:

Correct option is

B

2vsin20

∘

Given : ∣

v

1

∣=∣

v

2

∣=v

The angle between them is 40

o

∣△

v

∣

2

=v

2

+v

2

−2v

2

cos40

∘

=2v

2

[1−(1−2sin

2

20

∘

]

=4v

2

sin

2

20

∘

or ∣△

v

∣=2vsin20

∘

.