Question

Two objects that are constrained to move in the xy-plane undergo a collision. Object 1 has mass 2.3 kg and its initial momentum just before the collision has the x- and y-components 15.1 kg⋅m/s and -6.9 kg⋅m/s, respectively. Object 2 has mass 4.7 kg and the x- and y-components of its initial momentum are 3.5 kg⋅m/s and 6.5 kg⋅m/s. Immediately after the collision the x- and y-components of object 1’s final momentum are 13.8 kg⋅m/s and 4.3 kg⋅m/s.

a Calculate the final total kinetic energy of the two objects, in joules.

b  Calculate the change in the internal energy of the two objects, in joules.

Answer 1