Abig rock is weathered over many years by a river and to only small pebbles remain the mass of all the pebbles is less than the mass of the rock what probably happened to the rest of the rock

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.