Atruck is traveling at 11.9 m/s down a hill when the brakes on all four wheels lock. the hill makes an angle of 15 ° with respect to the horizontal. the coefficient of kinetic friction between the tires and the road is 0.861. how far does the truck skid before coming to a stop?

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?