Answer:
The answer is b, friction.
Explanation:
Let's say you're riding your roller skates on the sidewalk. The surface of the sidewalk rubs against your skates, counteracting your movement while you proceed in the opposite direction that the sidewalk is counteracting. The force that causes that is friction.
C
<span>Write at least 20 characters to explain it well.</span>
Explanation:
The protons determines the atomic number which helps in identifying an atom of an element
Answer:

Explanation:
We are given that


Net force=F=
Mass,m=1.21 kg
Radius,r=0.723 m
We have to find the magnitude of its angular acceleration.
Moment of inertia ,
Substitute the values
Torque ,



