A `50 kg` woman is on a large swing (generally seen in fairs) of radius 9 m that rotates in a vertical circle at `6 "reve"//min`. What is the magnitude of her weight when she has moved halfway up ?

A 60-kg woman is on a large vertical swing of radius 20 m . The swing rotates with constant speed a. At what speed would she feel weightless at the top? b. At this speed what is her apparent weight at the bottom?

A circular motion addict of mass 80 kg rides a Ferris wheel around in a vertical circle of radius 12 m at a constant speed of 5.5 m/s (a) What is the period of the motion? What is the magnitude of the normal force on the addict from the seat when bothh go through (b) the highest point of the circular path and (c) the lowest point?

A small stone of mass 0.2 kg tied to a massless , inextensible string is rotated in a vertical circle of radius 2 m If the particle is just able to complete the vertical circle what is its speed at the highest point of the circular path ? How would the speed get affected if the mass of the stone is increased by 50% ? Take g = 10 m//s^(2) .

A 6 kg weight is fastened to the end of a steel wire of unstretched length 60 cm . It is whirled in a vertical circle and has an angular velocity of 2 rev//s at the bottom of the circle. The area of cross - section of the wire is 0.05 cm ^(2) . Calculate the elongation of the wire when the weight is at the lowest point of the path . Young's modulus of steel = 2xx10 ^(11) N //m^(2) .

A particle of mass 0.2 kg attached to a massless string in a verticle circle of radius 1.2 m. It is imparted a speed of 8 ms^(-1) at the lowest point of its circular path. Does the particle complete the verticle circle ? What is the change in tension in the string when the particle moves from the position where the string is vertical to the position where the string is horizontal ?

A 62 kg woman is a passenger in a “rotor ride” at an amuse ment park. A drum of radius 5.0 m is spun with an angular velocity of 25 rpm. The woman is pressed against the wall of the rotatingdrum as shown in figure (a) Calculate the normal force of the drum of the woman (the centripetal force that prevents her from leaving her circular path). (b) While the drum rotates, the floor is lowered. A vertical static friction force supports the woman’s weight. What must the coefficient of friction be to support her weight

A fighter aeroplane flying in the sky dives with a speed of 360 km//h in a vertical circle of radius 200 m .Weight of the pilot sitting in it is 75 kg . What will be the value of force with which the pilot presses his seat when the aeroplane is at highest position ? (g=10 m//s^(2))

The mechanism shown in figure-5.156 is used to raise a wooden box of mass 50kg .A string is wrapped around a cylinder that turns on an axle.The cylinder has radius 0.25 m and moment of inertia 0.92 kg-m^(2) about the axle. What magnitude of the force F applied tangentially to the rotating crank handle is required to raise the box with an acceleration of 0.80m // s.Here we can neglect the moment of inertia of the axle and the crank

An observer is standing at a point O, at a distance of 100 cm from a convex lens of focal length 50 cm. A plane mirror is placed behind the lens at a distance of 150 cm from the lens. The mirror now starts moving towards the right with a velocity of 10 cm//s . What will be the magnitude of velocity (in m//s) of her own image as seen by the observer, at the moment when the mirror just starts moving?