A2kg marble is moving at 3 m/s when it strikes another 4kg marble moving in the opposite direction at -3 m/s. what will be the velocity of the 4kg marble after the collision of the 2kg marble's new velocity is -4 m/s. also state the direction of the 2kg marble after they hit.

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

What is the major limitation to the light microscope?

How many astronauts have walked on the moon?