A police car is traveling at a velocity of 19.0 m/s due north, when a car zooms by at a constant velocity of 37.0 m/s due north. After a reaction time of 0.700 s the policeman begins to pursue the speeder with an acceleration of 4.50 m/s2. Including the reaction time, how long does it take for the police car to catch up with the speeder

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?