The sound gets louder, like hitting a metal pole on a thin metal beam, the energy increases as the sound does.
This is easy
Number 2 is 20 N to the right
Number 3 is 30 N up
Both are unbalanced
The answer should be B :)
Answer: 63 m/s
Explanation: If wheel drops vertically, you can use
conservation of energy : Ep = Ek. mgh = ½mv^2 and
solve v = √(2gh ) = √ (2·9.81 m/s²·200 m) = 62.6 m/s.
NOTE: wheel has also horizontal speed which was not mentioned here.
