Acar is traveling on a straight, level road under wintry conditions. seeing a patch of ice ahead of her, the driver of the car slams on her brakes and skids on dry pavement for 50 m , decelerating at 7.5 m/s2 . then she hits the icy patch and skids another 70 m before coming to rest.
a) if her initial speed was 78 mi/h , what was the magnitude of the deceleration on the ice?

Her magnitude of deceleration on the ice would be 15.126m/s

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.