A cannonball is launched with an initial velocity of 15.0 m/s from on top of a 12.0 m high cliff. It lands on a 4.0 m high cliff a range of 20.0 m away. What two possible launch angles could the cannonball have to make this possible? Solve the problem using geometric vectors.

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Gunpowder residue is most likely to show up where on a shooters hands

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.