A person of mass 60 kg wants to lose 5 kg by going up and down a 10 m high stairs. Assume he burns twice as much fat while going up than coming down. If 1 kg of fat is burnt on expending 7000 kilo calories, how many times must he go up and down to reduce his weight by 5 kg?

A person normally weighing 50 kg stands on a massless platform which oscillates up and down harmonically at a frequency of 2.0 s^-1 and an amplitude 5.0 cm. A wighing machine on the platform give s the persons weight against time Will there be any chage in weight of the body, during the oscillation?

A person normally weighing 50 kg stands on a massless platform which oscillates up and down harmonically at a frequency of 2.0 s^-1 and an amplitude 5.0 cm. A wighing machine on the platform give s the persons weight against time If answer to part is yes, what will be the maximum and minimum reading in the machine and at which position?

In Mohan's house,there are stairs for going down to the godown.Let us consider the numberof stairs going up to the terrace as positive integer,the number of stairs going down to the godown as negative integer and he ndumber repreenting ground level as zero.If Mohan godown 5 steps from the ground floor and then move up 12 steps from there,then where he will reach.Wirte down the answer as integer.

A person trying to lose weight (dieter) lifts a 10 kg mass, one thousand times, to a height of 0.5 m each time. Assume that the potential energy lost each time she lowers the massis dissipated:- How much work does she do against thegravitational force ?

A person trying to lose weight (dieter) lifts a 10 kg mass, one thousand times, to a height of 0.5 m each time. Assume that the potential energy lost each time she lowers the massis dissipated:- Fat supplies 3.8 xx 10^7J of energy per kilogram which is converted to mechanical energy with a 20% efficiency rate. How much fat will the dieter use up?

A water tank has steps inside it. A monkey is sitting on the topmost step(i.e., the first step). The water level is at the ninth step. After drinking water, he wants to go back. For this, he jumps 4 steps up and then jumps back 2 steps down in every move. In how many jumps will he reach back the top step?

A water tank has steps inside it . A monkey is sitting on the top most step (i.e . The first step).The water leve is at the ninth step . After drinking water , he wants to go back .For this he jumps 4 steps up and theu jumps back 2 steps down in evergy move .In how many jumps will be reach back the top step ?

A bomb of mass 1 kg is thrown vertically upwards with a speed of 100 m//s .After 5 seconds it explodes into two fragments .One fragment of mass 400 g is found to go down with a speed of 25 m//s .the second fragment just after the explosion will go (g=10 m//s^2) .

One end of a long string of linear mass density 8.0 xx 10^-3 kg m^-1 is connected to an electrically driven tuning fork of frequency 256 Hz. The other end passes over a pulley and is tied to a pan containing a mass of 90 kg. The pulley end absorbs all the incoming energy so that reflected waves at this end have negligible amplitude. At t= 0, the left end (fork end) of the string x = 0 has zero transverse displacement (y = 0) and is moving along positive y-direction. The amplitude of the wave is 5.0 cm. Write down the transverse displacement y asfunction of x and tthat describes the wave on the string

Shown in the figure a spring fixed at the bottomm end of all incline of inclination 37^@ . A small block of mass 2 kg starts slipping down the incline form a point 4.8 m aaway from the spring. The block compresses the spring by 20 cm, stops momentarily and then rebounds through a distance of 1 m up the incline. Find the spring constant of the spring Take g = 10 ms^-2