In an exciting game, a baseball player manages to slide safely into second base. the mass of the player is 80.9 kg and the coefficient of kinetic friction between the ground and the player is .48
a. find the magnitude of the frictional force
b. if the player takes 1.4s to come to rest what was his initial velocity

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation 2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!