What is the apparent weight of a man of mass 60 kg who is standing on a lift which is moving up with a uniform speed?

A man of mass 70 kg stands on a weighing scale in a lift which is moving (a) upwards with a uniform speed of 10 m s^1 (b) downwards with a uniform acceleration of 5 m s^2, upwards with a uniform acceleration of 5 m s-^1z. What would be the readings on the scale in each case? What would be the reading if the lift mechanism failed and it hurtled down freely under gravity?

A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to 49 m/s. How much time does the bail take to return to his hands? If the lift starts moving up with a uniform speed of 5 m/s and the boy again throws the ball up with the maximum speed he can, how long does the ball take to return to his hands?

What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10 ms^-1 ?

A lift is accelerated upward. Will the apparent weight of a person inside the lift increases, decreases or remains the same relative to its real weight? If the lift is going with uniform speed, then?

A monkey of mass 40 kg climbs on a rope (Fig. 5.20) which can stand a maximum tension of 600 N. In which of the following cases will the rope break: the monkey (a) climbs up with an acceleration of 6 m s^2 (b) climbs down with an acceleration of 4 m s^2 (c) climbs up with a uniform speed of 5 m s^1 (d) falls down the rope nearly freely under gravity? (Ignore the mass of the rope).

A straight highway leads to the foot of a tower.A man standing at the top of the tower observed a car at an angle of depression of 30^@ ,which is approaching the foot of the tower with a uniform speed.Six seconds later,the angle of depression of the car is found to be 60^@ .Find the time taken by the car to reach the foot of the tower from this point.

What happens to speed, velocity acceleration when an object moves in a circle with uniform speed?

Calculate the de Broglie wave length of a ball of mass 0.16kg moving with a speed of 18m/s .