Acertain compound machine is made of two simple machines.
the output force of the first simple machine
of the second simple machine.
work input
input force
work output
output force

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy