Spiderman launches himself straight up at a velocity of 30 m/s. At the top of his trajectory, he fires another web. What are the knowns (givens) at the top of his trajectory?

Aplane flies directly between two cities, a and b, which are separated by . from a to b, the plane flies into a headwind. on the return trip from b to a, the wind velocity is unchanged. the trip from b to a takes less than the trip from a to b. what is the airspeed of the plane, assuming it is the same in both directions

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?