It’s hard to count on peoples easily with many other
The ball’s speed and direction at the lowest point of trajectory are; 3.1 m/s and swing to the same angle on the other side
<h3>What is the speed at the lowest point?</h3>
We will assume that all of the motion will transfer to Kinetic Energy at the lowest point. Now, the difference in height will be;
Δh = (130 – 130*cos °5) = 0.49 cm
The change in PE is;
ΔP.E = mgΔh
ΔP.E = 9.8m/s² × 0.75kg × 0.049 m
ΔP.E = 0.36015 J
Formula for kinetic energy is;
K.E = ¹/₂*m*v²
From conservation of energy;
K.E = P.E
Thus;
¹/₂* 0.075 * v² = 0.36015
v = √[(0.36015 * 2)/0.075]
v = 3.1 m/s
Thus, the pendulum will swing to the same angle on the other side.
Read more about Speed of Pendulum at; brainly.com/question/17054952
Answer:
A) 2700
Explanation:
Given:
Total number of votes is 7500
20% of the votes are invalid
80% of the votes are valid
55% of the total of valid votes were given to one of the candidates.
45% of the total of valid votes were given to the other candidate.
80% of 7500 = 6000
20% of 7500 = 1500
Let's check to see if we are correct!
6000 + 1500 = 7500
Seems like we are correct! Now, let's do the other part.
55% of 6000 = 3300
45% of 6000 = 2700
Let's check to see if we are correct!
3300 + 2700 = 6000
We are correct again! Seems like the person who got 45% of the candidates who gave valid votes got 2700! There is our answer!
Hope I helped! <3
