Could the snowboarder stop himself in mid-air, even for a moment?

Asteady current of 1 ais flowing through a conducter calculate the number of electrons that flows through conductor in 1second

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star