Home
Class 12
PHYSICS
A particle is thrown at time t = 0 with ...

A particle is thrown at time t = 0 with a velocity of `10 ms^(-1)` at an angle `60^@` with the horizontal from a point on an inclined plane, making an angle of `30^@` with the horizontal. The time when the velocity of the projectile becomes parallel to the incline is

A

`2/sqrt3`

B

`1/sqrt3`

C

`sqrt3`

D

`1/(2sqrt3)`

Text Solution

Verified by Experts

The correct Answer is:
B
Taking x-axis along the inlcice and y-axis perpendicular to incline `u_(y)=10 sin (30^(@)), a_(y)=g cos (30^(@))`
When velocity becomes parallel to the inclined plane `v_(y)=0 rArr 10sin(30^(@))-g cos (30^(@))t=0 rArr t=1/sqrt3`
Promotional Banner

Similar Questions

Explore conceptually related problems

A particle is thrown at time t=0 with a velocity of 10 m/s at an angle of 60^(@) with the horizontal from a point on an incline plane, making an angle of 30^(@) with the horizontal. The time when the velocity of the projectile becomes parallel to the incline is :

A particle is projected with velocity 50 m/s at an angle 60^(@) with the horizontal from the ground. The time after which its velocity will make an angle 45^(@) with the horizontal is

A particle is projected with a velocity of 30 m//s at an angle 60^(@) above the horizontal on a slope of inclination 30^(@) . Find its range, time of flight and angle of hit.

An inclined plane makes an angle of 60^(@) with horizontal. A disc rolling acceleration equal to:

A body is thrown with a velocity of 9.8 m//s making an angle of 30^(@) with the horizontal. It will hit the ground after a time

A projectile is thrown with a velocity of 20 m//s, at an angle of 60^(@) with the horizontal. After how much time the velocity vector will make an angle of 45^(@) with the horizontal (in upward direction) is (take g= 10m//s^(2))-

A particle is projected with a velocity of 20 ms^(-1) at an angle of 60^(@) to the horizontal. The particle hits the horizontal plane again during its journey. What will be the time of impact ?