The problem involves the conversion of potential energy to kinetic energy as the object falls from rest. Energy is conserved, so the equation used is:
PEi + KEi = PEf + KEf
Since the object is falling from rest, the initial kinetic energy is zero. Also, since the object hits the ground at its final position, the final potential energy is zero. This leaves:
PEi = KEf
mgh = 1/2 mv^2
*cancel out mass on both sides of the equation
gh = 0.5v^2
v = sqrt(2gh) = sqrt(2*9.81*4.5) = 9.40 m/s --> final ans.
Answer:
please find the answer in the attached image, divided in 2 parts.
This question involves the concepts of tension, weight, and centripetal force.
The maximum speed, the mass can have before the string breaks is "10.26 m/s".
First, we will find the maximum tension force:
Tension = Weight
T = W = mg = (32.4 kg)(9.81 m/s²)
T = 317.84 N
Now, this tension force must be equal to the centripetal force:
where,
v = maximum speed = ?
r = radius = 1.21 m
m = mass = 3.65 kg
Therefore,
<u>v = 10.26 m/s</u>
Learn more about centripetal force here:
brainly.com/question/11324711?referrer=searchResults
The attached picture shows the centripetal force.
Distance, since distance represents how far something has travelled, which would be in our case 2.5m.
Answer:
Lasswell's 5 step model
Explanation:
This model of communication defines the answers to the questions who says, to whom, says what, the effects it was said with and in what channel.
Lasswell's 5 step model of communication was described as a single way process and was used for the analysis of mass communication, communication in groups and between people to disperse messages into these. It was designed for the purpose of studying and analyzing the business strategies and the media hype of different countries at that time.
