A man (mass `=50kg`) and his son (mass `=20kg`) are standing on a frictionless surface facing each other , the man pushes his son so that he start moving at a speed of `0.70ms^(-1)` with respect to the man. The speed of the man with respect to the surface is:
A man (mass = 50 kg) and his son (mass = 20 kg) are standing on a frictionless surface facing each other. The man pushes his son so that he starts moving at a speed of 0.70 m s^(-1) with respect to the man. The speed of the man with respect to the surface is:
To a stationary man, rain appears to be falling at his back at an angle 30^@ with the vertical. As he starts moving forward with a speed of 0.5 m s^-1 , he finds that the rain is falling vertically. The speed of rain with respect to the moving man is.
To a stationary man, rain appears to be falling at his back at an angle 30^@ with the vertical. As he starts moving forward with a speed of 0.5 m s^-1 , he finds that the rain is falling vertically. The speed of rain with respect to the stationary man is.
A man of mass m is standing on a plank of equal mass m resting on a smooth horizontal surface. The man starts moving on the plank with speed u relative to the plank. The speed of the man relative to the ground is
A man of 50 kg is standing at one end on a boat of length 25m and mass 200kg .If he starts running and when he reaches the other end, has a velocity 2ms^(-1) with respect to the boat.The final velocity of the boat is
A man is sitting in a train which is moving with a velocity of 60 km/hour. His speed with respect to the train is:
A man of mass 70kg stands on a weighing scale in a lift which is moving:
A man of mass 50 kg us standing on a 100 kg plank kept on a fricitonless horizontal floor. Initially both are at rest. If the man starts walking on the plank with speed 6m//s towards right relative to the plank, then amount of muscle energy spent by the man is
