A boy fires a 60 g pebble with his slingshot. The pebble leaves the slings hot at 35 m/s. How high above the slingshot will the pebble rise if it is fired straight up?
If the pebble is fired so that it goes in an arc and has a speed of 10 m/s at its maximum height, what will the maximum height be?
At what speed would an 80 g pebble have to be fired to reach the same height as the pebble in (a)? Assume that the 80 g pebble is also fired straight up.

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?