What’s the velocity of a ball falling with 100 joules of kinetic energy and a mass of 2 kilograms? use the formula, . a. 3 m/s b. 5 m/s c. 7 m/s d. 8 m/s e. 10 m/s

10 m/s

Explanation:

K.E. = 100 J

m = 2 kg

Let v be the velocity of ball.

Us ethe formula for kinetic energy

K.E. = 1/2 m v^2

100 = 0.5 x 2 x v^2

100 = v^2

v = 10 m/s

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

well clustered together.

points close on a scatter diagram