Vo=36mi/h * 1600m/mi * 1h/3600s=16 m/s.
V = Vo + a*t = 0
16 + a*2.4 = 0
2.4a = -16
a = -6.67 m/s^2.
F = m*a = 58 * (-6.67) = -386.7 N.
The negative sign means that the force was in the opposite direction of the motion.
Suzie (of mass 58 kg) is roller-blading down
the sidewalk going 36 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
.
4 seconds.
What is Suzie’s average acceleration?
Answer in units of m
/
s
2
009 (part 2 of 3) 1.0 points
What force was exerted to stop Suzie?
1 answer
1 answer