Read the following selection from the section "Energy Can Change Form."
The ball's kinetic energy is changed
into heat by the opposing force of
friction. Friction is the force resisting
objects sliding against each other.
The ball stops at the bottom of the
hill because friction transforms all its
kinetic energy into heat. As with
energy transfers, the amount of
energy stays the same in
transformations.
Based on this selection, choose the statement
that is TRUE.

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?