a) Change in Kinetic energy = Work Done
We require Normal Force N,
N + 188 X sin(28.6 ) - m x g = 0
so N = m x g - 188 x sin(28.6)
= 19.7 Kg x 9.8m/s^2 - 188 x sin(28.6)
= 19.7 Kg x 9.8m/s^2 - 188 x 0.478
= 193.06 Kg.m/s^2 - 89.864 N
= 103.196 N
Wvertical = F*x = μ X 103.196 x 48.7 = 0.103 X 103.196 x 48.7
= 517.641 N
Whorizontal = F*x = F x cos(28.6 ) x 48.7
= 188 x cos(28.6 ) x 48.7
= 188 x 0.877 x 48.7
= 8029.46 J
b) V^2 = U^2 + 2 x a x s
V = (2 x a x s)^0.5
= 13.486 m/s
Answer:
Explanation:
mass of backpack, m = 8.1 kg
weight of climber, W = 656 N
height raised, h = 9.4 m
time, t = 28.2 min = 28.2 x 60 = 1692 second
weight of backpack, w = m x g = 8.1 x 9.8 = 79.38 N
Work done by the climber on the backpack = mg x h = 79.38 x 9.4 = 746.17 J
Wok done in lifting herself + backpack = (W + w) x h
= (656 + 79.38) x 9.4 = 6912.57 J
Power developed by the climber,P = Total work / time
P = 6912.57 / 1692 = 4.09 W
Answer:
520 miles per hour
Explanation:
Let the speed of the Boeing 747 be x miles per hour.
The small airplane covers distance of 780 miles with speed 260 miles per hour.
Also,
After 1.5 hours the Boeing 747 leave the same place and reaches at same time. Both covered distance of 780 miles.
So,
<u>Time taken by Boeing 747 + 1.5 hours = Time taken by small plane.</u>
Also,
Time = Distance/ speed
So,
780 / x + 1.5 = 780/ 260
Solving for x, we get:
<u>x = 520 miles per hour</u>
Unalienable rights are the natural rights to which all people are entitled.
The right of the people to alter or to abolish government means that the government exists to serve the people.
The words "governments are instituted among men" describe the idea of a social contract.
Answer: 1 and 6, 2 and 5, 3 and 4.
<u>Explanation:</u>
The government is a system in which the power to administer or to govern the country is given to that system and divided among the different organisations of that system. There is proper division of the power so that there is no abuse of the power by the government officials.
The government of the country is for the betterment of the country and for the welfare of the people of that country. They exist for the people and therefore the people have to right to change or abolish the people. There are certain unalienable rights given to the citizens which can not be taken from them.