Why the impact of the loaded truck on a body coming it’s the way is very large even if the truck is moving slowly​

due to large momentum

Explanation:

The impact of the loaded truck is very large on a body coming in its way because of the momentum associated with truck. Truck has a huge mass which is responsible for its large momentum.

Momentum is the product of mass and velocity. Even though the velocity of truck is low but it's mass compensates for it to give large momentum. This large momentum can overwhelm any small body at rest or coming in its way.

I'm not completely sure but it would be transmission simply because what I learned is the transmission does go from one medium into another it's either that or refraction again not completely sure but hope this helped