What is the momentum of a dog of mass 14 kg that is running east with a
speed of 8 m/s?
O
A. 112 kg-m/s east
O
B. 54.2 kg•m/s east
O
C. 135 kg•m/s east
O
D
1.8 kg•m/s east

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic