HELP 2 QUESTIONS 100 PTS
If the mechanical advantage of a machine is 4, what can you infer about the machine?


The output force is 4 times the input force.


The input force is 4 times the output force.


The output work is 4 times the input work.


The efficiency is 4%.



A ball with a mass of 10 kg rolls down a hill which has a vertical height of 15 m. Ignoring friction, what would be the speed of the ball when it reaches the bottom of the hill?


17.15 m/s


12.12 m/s


1470 m/s


294 m/s