A car of mass 800kg is travelling with a velocity - вопрос №8001821019486 от mishkateddi19 23.12.2020 16:00

Question

Физика: A car of mass 800kg is travelling with a velocity of 18km/h. When breaks are applied it stops after travelling a distance of 25 meters. Find a resitive force(N). A) 400N B) 300N C) 350N D) 500

mishkateddi19 · Answer

m=800 kgVo=18 km/h=5 m/sV=0 m/sS=25 mF-?F=maS=(V²-Vo²)/2aa=-Vo²/2Sa=-25/2*25=-0.5 m/s²F=800*0.5=400 NA...