A particle is projected with speed `20m s^(-1)` at an angle `30^@` With horizontal. After how much time the angle between velocity and acceleration will be `90^@`

A particle is projected with speed 'u' at an angle 60^@ with horizontal, then find the speed when its angle with horizontal changes to 30^@ .

A particle is thrown with a speed u at an angle theta with horizontal. After how much time the velocity of particle will be perpendicular to the initial motion of direction

A particle is projected with speed 10 m//s at angle 60^(@) with the horizontal. Then the time after which its speed becomes half of initial.

A particle is projected with speed 10 m//s at angle 60^(@) with the horizontal. Then the time after which its speed becomes half of initial.

A particle is projected from the surface of the earth with a speed of 20 m* s^(-1) at an angle 30^@ with the horizontal . The range of that particle is

A particle is thrown with speed u at an angle alpha with horizontal from the ground. After how much time, the velocity of particle will make an angle beta with horizontal.

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 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 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 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))-