Question

A 3. 0 kg object moves to the right with a speed of 4. 0 m/s. It collides in a perfectly elastic collision with a 6. 0 kg object moving to the left at 2. 0 m/s. What is the total kinetic energy after the collision?.

Answer 1

K.E=12J

Step-by-step explanation:

K.E=m1u1+m2u2

where K.E= total kinetic energy, m=mass of body A,u1=speed of body A ,m2=mass of body B, u2= speed of body B

A. kinetic energy =1/2mv²

=1/2×3×4

=3×2=6J

B. =1/2×6×2

=3×2=6J

total K.E=K.E1+K.E2

K.E=6+6

K.E=12J