A car is being driven down a level track with no net force on it. This motion is best described as A)Linear motion
B)circular motion
C) periodic motion
D) projectile motion

A)Linear motion

If there is not net force on the car, then by the Newton Second Law, the acceleration is zero, and the only valid option for zero acceleration is A).

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

it is b. absorbs thermal energy