Suzie (of mass 42 kg) is roller-blading down the sidewalk going 32 miles per hour. she notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 2.2 seconds. a) what is suzie’s average acceleration? answer in units of m/s 2 .b) what force in newtons was exerted to stop suzie? answer in units of n.

a) Suzie’s average acceleration = -6.46 m/s²

b) Force exerted to stop Suzie = 271.52 N

Explanation:

a) We have equation of motion, v = u + at

     Final velocity, v = 0 m/s

     Initial velocity, u = 32 mph = 14.22 m/s

     Time, t =2.2 s

Substituting

     0 = 14.22 + a x 2.2

     a = -6.46 m/s²

Suzie’s average acceleration = -6.46 m/s²

b) Mass of Suzie = 42 kg

   Force = Mass x Acceleration

   F = Ma

   F = 42 x -6.46 =-271.52 N

   Force exerted to stop Suzie = 271.52 N

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide