A20-kg barrel is rolled up a 20-m ramp to the back of a truck whose floor is 5.0 m above the ground. what work is done in loading one barrel into the truck? a: 980j b: 19,600j c : 4900j d : imposible to tell because velocity is not given.,

Orque can be calculated by multiplying the force (n) applied at 90? to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n? m. if the force (at 90? to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

Oxygen and hydrogen gas are at the same temperature t. what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.

Which lists the organs in the correct order as food passes from the mouth to anus?