Compare the ke of an 80 kg person walking at 4 m/s with that of the same person moving at 6 m/s. ke at 4 m/s = ke at 6 m/s ke at 4 m/s less than ke at 6 m/s the answer cannot be determined ke at 4 m/s greater than ke at 6 m/s

The correct answer is:
KE at 4 m/s less than KE at 6 m/s

In fact, the formula for the kinetic energy is:

where m is the mass of the person and v his speed.

When the person is moving at 4 m/s, his kinetic energy is:

instead, when he's moving at 6 m/s, his kinetic energy is:


So, the kinetic energy at 4 m/s is less than the kinetic energy at 6 m/s.

The magnets would be | n s | and | s n|

Answer

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

explanation

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force