A person is standing on a weighing machine placed near a door. What would be the effect on the reading of the machine if a person pulls downwards ?

A woman weighing 50 kgf stands on a weighing machine placed in lift. What will be the reading of the machine, when the lift is (i) moving upwards with a uniform velocity of 5ms^(-1) and (ii) moving downwards with a uniform acceleration of 1ms^(-2) ? Take g = 10 ms^(-2) .

A boy is standing on a weighing machine placed on a horizontal platform. The reading of weighing machine is 70 kg. Using a suitable mechanism the platform is made to execute harmonic vibrations with a frequency of 1 vibration per second. Calculate the maximum and minimum force exerted on the boy if the amplitude of vibration of platform is 6 cm.

A perso is standing on a weighing machine placed on the floor of an elevator. The elevator starts going up with some acceleratiion, moves with uniform velocity for a while and finally decelerates to stop. The maximum and the minimum weights recorded are 72 kg and 60 kg. Assuming that the magnitudes of the acceleration and the decelaration are teh same., find a. the true weight of the person and b. the magnitude of the acceleration. Take g=9.9 m/s^2 .

If someone receives a blow on the back of neck , what would be the effect on the person's CNS ?

A boy is standing on a weighing machine placed on the floor of an elevator. The elevator starts going down with some acceleration, moves with constant velocity for some time and finally decelerates to stop. The minimum and maximum weight recorded are 480N and 840N If the magnitude of reardation is double of acceleration, find (a) true weight of the boy and (b) magnitude of acceleration.

A man of mass 60 kg is standing on a weighing machine kept in a box of mass 30 kg as shown in the diagram. If the man manages to keep the box stationary, find the reading of the weighing machine.