Answer:
Explanation:
Given that
Radius of disk is
r=23cm=0.23m
The disk starts from rest at t=0
Given angular acceleration
α=3rad/s²
Density of disk is p=8600kg/m³
Energy stored K.E=800J
time taken t=8s
Thickness?
Check attachment for solution
a. The force experienced by the dummy with a seatbelt is 11,000 Newton.
b. The force experienced by the dummy without a seatbelt is 4,400 Newton.
<u>Given the following data:</u>
a. To calculate the force experienced by the dummy with a seatbelt:
<h3>Newton's Second Law of Motion</h3>
In order to solve for the force acting on the dummy, we would apply Newton's Second Law of Motion.
<u>Note:</u> The acceleration of an object is equal to the rate of change in velocity with respect to time.
Mathematically, Newton's Second Law of Motion is given by this formula;

Substituting the given parameters into the formula, we have;

Force = 11,000 Newton.
b. To calculate the force experienced by the dummy without a seatbelt:

Force = 4,400 Newton.
Read more on force here: brainly.com/question/1121817
100 m/ 20 s= 5 m/s.
They were running at a speed of 5 m/s~
I don’t think I need anything from my dad to get my hair fixed so I’m just bored I don’t want you guys
Mirror formula
1/f = (1/p) + (1/q) [ f= focal length , p= object distance , q = image distance ]
as given convex mirror so
distance of object =p= 6cm
focal length = -8cm
to find q=?
1/q =( 1/f) - (1/ p)
1/q = (1/ 8) -(1/6)
1/q =-1/24
q=-24 ( negative sign shows image is virtual and behind the mirror)