Answer:
Part a)

Part b)

Explanation:
Part a)
Time period of one revolution is given as
T = 42 s
now the angular speed of the belt is given as



Now at rest position the force along the surface of carousel must be constant
so we will have



Part b)
New Time period of one revolution is given as
T = 30 s
now the angular speed of the belt is given as



Now at rest position the force along the surface of carousel must be constant
so we will have



Also we know that in perpendicular direction also force is balanced




now for friction coefficient we will have



Answer:
it will option B,hope it helps
Answer:
C. Protons are positive, neutrons are neutral, and electrons are negative
The friction between the tires and the road causes loss of energy in the form of heat-energy.
<h3>What is kinetic energy?</h3>
The term kinetic energy refers to the energy of an object that is in motion. The pasengers that are sitting at a point possess potential energy. If the bus stops suddenly, the potential energy of the passengers is converted to kinetic energy as they move forward.
Since friction causes loss of energy, the friction between the tires and the road causes looss of energy in the form of heat-energy.
Learn more about kinetic energy: brainly.com/question/12669551