A particle of mass m is observed from an inertial frame of reference and is found to move in a circle of radius r with a uniform

speed u. The centrifugal force on it is

Two cars having masses m₁ and m₂ move in circles of radii r₁ and r₂ respectively. If they complete the circle in equal time, the ratio of their angular speeds ω₁/ω₂ is

A car moves at a constant speed on a road as shown in figure below the normal force by the road on the car is NA and N9 when it is at the points A and B respectively.

A particle of mass m rotates with a uniform angular speed ω. It is viewed from a frame rotating about the Z-axis with a uniform

angular speed ω₀. The centrifugal force on the particle is

A particle is kept fixed on a turntable rotating uniformly. As seen from the ground the particle goes in a circle, its speed is 20 cm/s and acceleration is 20 cm/s². The particle is now shifted to a new position to make the radius half of the original value. The new values of the speed and acceleration will be