Motion 1) How can you tell if velocity is constant from a position-time graph? 2) How is the velocity determined from a linear position-time graph? 3) Assume the direction to the right is positive. What is the difference between the position-time graphs of a cart moving to the left at constant speed and a cart moving to the right at an equal constant speed?

no. 2 e

78. An open rail car of initial mass 10,000 kg is moving at 5.00 m/s when rocks begin to fall into it from a conveyor belt. The rate at which the mass of rocks increases is 500 kg/s. the speed of the train car after rocks have fallen into the car for a total of 3.00 s. Example 7-2 Find

2.7 Problem 23