explain what additional information you would need to calculate the mechanical energy of a book that was lifted to a height of 3.0 meters. in your answer, write out any formulas you need to compute mechanical energy. (please answer this very quickly)

i believe it is b. what was the cause of the big bang

hope this !

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.