Abusy chipmunk runs back and forth along a straight line of acorns that has been set out between his burrow and a nearby tree. at some instant the little creature moves with a velocity of -1.03 m/s. then, 2.47 s later, it moves at the velocity 1.51 m/s. what is the chipmunk\'s average acceleration during the 2.47-s time interval?

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?