A pilote of mass `m` can withstand a maximum apparent weight `6` times of `mg`. The minimum radius curvature of vertical circle in which the aeroplane dives up from lowest point with a speed `504 kmph` is

A pilot of mass m can bear a maximum apparent weight 7 times of mg . The aeroplane is moving in a vertical circle. If the velocity of aeroplane is 210 m//s while diving up from the lowest point of vertical circle, then the minimum radius of vertical circle should be

A particle of mass m is being circulated on a vertical circle of radius r. If the speed of particle at the highest point be v, then

A particle of mass m is being circulated on a vertical circle of radius r. If the speed of particle at the highest point be v, then

The human body can safely stand an acceleration 9 times that due to gravity which is 10 m//s^(2) . The minimum radius of curvature with which a pilot may safely turn a plane vertically upward at the end of a dive, when the plane's speed is 720km/hr is :

A stone of mass 1kg is tied with a string and it is whirled in a vertical circle of radius 1 m. If tension at the highest point is 14 N, then velocity at lowest point will be

A stone of mass 1kg is tied with a string and it is whirled in a vertical circle of radius 1 m. If tension at the highest point is 14 N, then velocity at lowest point will be

A small stone of mass 50 g is rotated in a vertical circle of radius 40 cm. What is the minimum tension in the string at the lowest point?

A small stone of mass 50 g is rotated in a vertical circle of radius 40 cm. What is the minimum tension in the string at the lowest point?

An object is projected vertically upward from the surface of the earth of mass M with a velocity such that the maximum height reached is eight times the radius R of the earth. Calculate: (i) the initial speed of projection (ii) the speed at half the maximum height.