A woman was recently given the opportunity to ride in a Porsche race car on their test track. Below is a graph of just a short segment of her ride. During which segment(s) of her trip was the car stopped? A. Segments A-B, C-D, and E-F
B. Segments A-B and E-F
C. Segment C-D
D. Segments C-D and E-F

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

490 n

f=125n a=2.5m/s2

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.