1.A 1300-kg jeepney is moving at speed of 25m/s. Calculate it's kinetic energy2.calculate the kinetic energy of a cart that is moving at 15m/s if its mass is 65kg3.if car A has a mass of 1250-kg with a velocity of 35m/s, while car B has a mass of 1175-kg with a velocity of 37m/s. which has greater kinetic energy? (need kopo ung answer ASAP!)
Answer (1)
1. KE = ½(m)(v)² KE = ½(1300kg)(25m/s)² KE = ½(1300kg)(625m/s) KE = 650 • 625 KE = 406,250 J2. KE = ½(m)(v)² KE = ½(65kg)(15m/s)² KE = ½(65kg)(225m/s) KE = 32.5 • 225 KE = 7,312.5 J3. Calculate the kinetic energy of two cars:Car A:KE = ½(m)(v)²KE = ½(1,250kg)(35m/s)²KE = ½(1,250kg)(1225m/s)KE = 625 • 1225KE = 765,625 JCar B:KE = ½(m)(v)²KE = ½(1,175kg)(37m/s)²KE = ½(1,175kg)(1369m/s)KE = 587.5 • 1369KE = 804,987.5 J
