Solutions

Question-5 : Spider-Man No way reaches surface!!

Green Goblin who was chasing Spiderman (M = 50Kg), who was about to save MJ who slipped off a building. Spiderman notices that his web-shooters fail to work at that moment. Ned immediately finds out that Spiderman's body has a charge of 10 C and also notices a homogeneous magnetic field of 10T below the building reaching a height w=10 meters and he also says that Spiderman need not worry as he will not reach the surface and informs this to him. The field is perpendicular to the vertical, the velocity of Spiderman at the moment of entering the magnetic field has a vertical component only. Assume that the magnetic field is pointing in the right direction so Spiderman does not hit the building. (Neglect air resistance and acceleration due to gravity is g = 9.8 m/s^2). What is the maximum height of the building h (in meters) from which Spiderman can jump without reaching the surface?