Please help! Thank you! The question is: Using your graph, approximately how many Calories per hour will be used by the dog when running at an average speed of 5 km/h? [1]

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)