Question

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 ​

Answer 1

Answer:

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