AB is a firictionless inclined surface making an angle of 30° with horizontal. A is 20 m above the ground while B is 10 m above the ground. A block slides down from A, initially starting from rest. Its velocity on reaching B is

AB is a frictionless inclined surface making an angle of 30^@ with horizontal. A is 6.3 m above the ground while B is 3.8 m above the ground. A block slides down form A , initially starting from rest. Its velocity on reaching B is .

A particle is projected from ground with some initial velocity making an angle of 45^(@) with the horizontal. It reaches a height of 7.5 m above the ground while it travels a horizontal distance of 10 m from the point of projection. The initial speed of the projection is

A block is at rest on an inclined plane making an angle alpha with the horizontal . As the angle alpha of the incline is increased the block starts slipping when the angle of inclination becomes theta . The coefficient of static friction between the block and the surface of the inclined plane is or A body starts sliding down at an angle theta to the horizontal. Then the coefficient of friction is equal to

If the ladder is inclined at an angle of 30^(@) with the ground and it reaches at a height of 4m from the ground, the the length of the ladder is

A block slides down an inclined surface of inclination 30^0 with the horizontal. Starting from rest it covers 8 m in the first two seconds. Find the coefficietn of kinetic friction between the two.

A projectile projected with initial velocity 20m/s and at and angle of 30^(@) from horizontal. Find the total work done when it will hit the ground.

A track has two inclined surface AB and DC each of length 3 m and angle of inclination of 30^@ with the horizontal and a central horizontal part of length 4m shown in figure. A block of mass 0.2 kg slides from rest from point A. The inclined surfaces are frictionless. If the coefficient of friction between the block and the horizontal flat surface is 0.2, where will the block finally come to rest ? [in 10^(-1) m ]

A ball is thrown from the ground with a velocity of 20sqrt3 m/s making an angle of 60^@ with the horizontal. The ball will be at a height of 40 m from the ground after a time t equal to (g=10 ms^(-2))

A smooth inclined plane is inclined at an angle theta with the horizontal. A body starts from rest and slides down the inclined surface. The time taken by the body to reach the bottom is