Question

select all the correct answers. which situations describe an elastic collision? two glass marbles bounce off each other. rodrick flops onto his sofa and sinks into the cushion. a tossed water balloon flattens when it lands on the grass. a bowling ball knocks over five pins.

Explanation:

In an elastic collision, kinetic - energy is conserved. When two glass marbles bounce off each other, kinetic energy is conserved and this is an elastic collision. A bowling ball knocking over pins is an in - elastic collision as energy is lost in the form of sound, heat etc. A tossed water balloon flattening when it lands is in - elastic as it deforms and loses energy. Rodrick flopping onto the sofa and sinking is also in - elastic due to energy loss in deformation.

Answer:

Two glass marbles bounce off each other.