A ball traveling at 3 m/s East hits a wall and bounces off heading West traveling at 2 m/s. If the change in direction took 0.4 second, what is the average acceleration of the ball?

A.) More information is needed
B.) 2.5 m/s^2 West
C.) 12.5 m/s^2 West
D.) 2.5 m/s^2 East
E.) 12.5 m/s^2 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 bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?