Which has more momentum a 100 kg kid riding a bike 10m/s or a 5000 kg truck barley rolling at 0.1 m/s

The momentum of bike is more.

Explanation:

Given that,

Mass of the kid, m = 100 kg

Speed of the bike, v = 10 m/s

The momentum of the kid is given by :

p = mv

So,

p = 100 kg × 10 m/s

p = 1000 kg-m/s

Mass of the truck, m = 5000 kg

Speed of the truck, v = 0.1 m/s

The momentum of the truck is given by :

p = 5000 kg × 0.1 m/s

= 500 kg-m/s

So, the momentum of the kid riding a bike is more than that of the truck.

d. air pressure decreases as altitude increases.