The answer for <span>electromagnetic radiation released during radioactive decay i</span>s C. He
Answer:
44J
Explanation:
Given parameters:
Mass of rock = 0.22kg
Initial velocity = 20m/s
Distance moved = 10m
Unknown:
Initial kinetic energy of the rock = ?
Solution:
To solve this problem, we need to understand that kinetic energy is the energy due to the motion of a body.
It is mathematically expressed as;
Kinetic energy = m v²
m is the mass
v is the velocity
Kinetic energy = x 0.22 x 20² = 44J
Answer:
Tread design on car B would yield a larger coefficient of static friction between the tires and the road
Explanation:
The car model using the coefficient of static friction doesn't work well with tires. A higher coefficient of static friction would require more force to cause a loss of attraction.
The static frictional force helps to keep the unbanked horizontal turn. This means that the frictional force is the centripetal force.
The tread design of car B ensures that the centripetal force is enough to negotiate the turn. On the other hand, the tread design of car A does not provide the necessary centripetal force, hence car A is unable to negotiate the turn.
Therefore, tread design on car B would yield a larger coefficient of static friction between the tires and the road.