Home
Class 12
PHYSICS
A particle moving with a speed v changes...

A particle moving with a speed v changes direction by an angle `theta`, without change in speed.

Text Solution

Verified by Experts

The correct Answer is:
A, C
`overset(-)v_(1)=v hati, overset(-)v_(f)=V cos theta hati+V sin theta hatj rArr triangle overset(-)(V)=(V cos theta-v)hati+v sin theta hatj`
`|triangle overset(-)v|=sqrt(v^(2) cos^(2) theta+v^(2)-2v^(2) cos theta+v^(2) sin^(2) theta)`
`=sqrt(2v^(2)-2v^(2) cos^(2) theta) =2v sin (theta//2)`
Promotional Banner

Similar Questions

Explore conceptually related problems

Aparticle moves with a speed v changes direction by an angle theta , without change in speed.

A particle moving with velocity V changes its direction of motion by an angle theta without change in speed. Which of the following Statement is not correct?

A body of mass M moving with a speed V collides on a surface at an angle 45 degree without changing its speed the change in momentum of the body will be-

A ball of mass m is moving towards a batsman at a speed v. The batsman strikes the ball and deflects it by an angle theta without changing its speed. The impulse imparted to the ball is given by

STATEMENT - 1 : A ball of mass m is moving towards a batsman at a speed v. The batsman strikes the ball and deflects it by an angle theta without changing its speed. The impulse imparted to the ball is zero. because STATEMENT - 2 : Impulse = change in momentum.

A car moving with a speed of 25 ms^(-1) takes a U-turn in 5 seconds, without changing its speed. The average acceleration during these 5 seconds is

A particle of mass 2 kg moving with a velocity of 3 m//s is acted upon by a force which changes its direction of motion by an angle of 90^(@) without changing its speed. What is the magnitude of impulse experienced by the particle?

A particle is projected with a speed v at an angle theta with the horizontal. Find the mean power delivered by gravity during the ascent of the particle.

A particle is thrown with a speed u at an angle theta with the horizontal. When the particle makes an angle phi with the horizontal. Its speed changes to v :

A particle is projected with a speed u at an angle theta with the horizontal. What will be the speed of the particle when direction of motion of particle is at an angle alpha with the horizontal?