PROBLEM 11.141 Racecar A is traveling on a straight portion of the track while racecar B is traveling
on a circular portion of the track. At the instant shown, the speed of A is increasing at the rate of 10
m/s?, and the speed of B is decreasing at the rate of 6 m/s?. For the position shown, determine (a) the
velocity of B relative to A, (b) the acceleration of relative to A.
A=240km/h
B=200km/h with angle 50

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?