Question

Two balls, of masses m and 2m, travelling in a vacuum with initial velocities 2v and v respectively, collide with each other head-on, as shown. m 2v v 2m After the collision, the ball of mass m rebounds to the left with velocity v. What is the loss of kinetic energy in the collision?

10 Two balls, of masses m and 2m, travelling in a vacuum with initial velocities 2v and v respectively, collide with each other head-on, as shown. 2m 2v m After the collision, the ball of mass m rebounds to the left with velocity v. What is the loss of kinetic energy in the collision? 클mv? D 을mu2 B mv2 c mv A

A 3/4 mv^2 B 3/2 mv^2 C 9/4 mv^2 D 9/2mv^2

Answer 1

minim before collision Affer collision since External force is zero. Linear momentum 18 conserved. Infiel momentum - find momentum 2mv thamv) - MV - 2mV, 2mv-2mv - - MV -2mV, o . mv - 2MV, av = 200, negative sign shows feet J velocity of sm mess 18 toward right Initial Kinetic energy of system: - (m) (W)" + I Im )r? = 2m? tmv? = 3m12 |(KE) imfiel = 3mv? = (kok) firmal = mw2 + + 2016 mit mon? The) find = Zmv2 J Loss of keem (K) 1 Loss of Ke 3m? - mo? - e non ha cercanas Most Important .