A car riding downhill at a speed of 20 m/s was applied brake when it was at a height of 30 m vertically above the bottom of a hill .When the car comes to halt at the bottom of the hill ,how much energy as heat must be dissipated by the brakes , if wind and other frictional effects are neglected. the car weighed 1400 kg.
بيبوووة (sweet bebe)Google إجابات-العلوم
أكثر...
