toy car with a mass of 3.1 KG has 60 J of kinetic energy as he drives along the street part of a restaurant what is the velocity of the car (HELP pls)

6.22 m/s

Explanation:

m= 3.1 kg

k = 60 j

k = ( 1/2 ) mv^2

k = 0.5 × 3.1 × v^2 = 60

v^2 = 60 ÷ ( 0.5 × 3.1 )

v^2 = 38.7

v = 6.22 m/s

b) phosphorus pentoxide

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.