a 115 kg football player moves a 135 kg training sled with a constant velocity. the ground has a u= 0.4. determine the amount of traction the football player had.​

The correct answer should be b let me know if i’m wrong

Newtons laws of motion

The genes are more on the side of.. b nature

Sounds propagates through some kind of medium. usually it's air, but it goes just as well through solid objects like walls, windows etc. a soundwave will compress the (air)molecules in front of it, and if this increased density wave hits your ears, you register it as sound. solid objects like walls are a lot denser than air, this means that they will damp a wave, but also carry it easier.