A car of mass 1380 kg, travelling at 31.1 m s^-1, is brought to rest by the brakes in 48.2 m. Calculate (i) the initial kinetic energy of the car
(ii) average deceleration of a car
(iii) the average braking force

Aboat that travels with constant speed of 6.10 m/s in still water is to go directly across a river. the current in the river flows at 1.95 m/s. (a) at what angle must the boat be steered?

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant