An old teacher runs across the floor with a velocity of 0.5 m/s (he's slowing down) with a mass
of 80 kg.

a. How much KE does he have now?

b. what is the weight of the old teacher

a. 10 Joules

b. 800 N

Explanation:

Given: Mass,m= 80 kg

Velocity,V=0.5m/s

g=10 N/kg

a. KE =½MV²

KE=½×80×(0.5)²

KE=40×0.25

KE=10 J

b. Weight,W=mg

W=80kg × 10N/kg

W=800 N

kinetic

i'm so sorry if this is wrong i'm only in 6th grade xd

the order for strong to weak forces such as

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

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