Answer:
-9446.22 J
Explanation:
Parameters given:
Mass of climber and harness = 56kg
Mass of cable = 0.7kg
Distance between climber and top of rock face = 17m
The work done in pulling the climber is given as:
W = F * d
F is the force applied on the rope. It is opposite the force of gravity pulling the climber, hence, it is given as:
F = -Fg
Fg = force of gravity
Fg = m * g
g = acceleration due to gravity.
The mass of the climber, harness and cable = 56 + 0.7 = 56.7kg
=> Fg = 56.7 * 9.8
Fg = 555.66 N
Therefore, the work done will be:
W = - 555.66 * 17
W = -9446.22 J
The negative value of work means that the work done is opposite the value of the force acting on the climber.
Answer:
made with the material that is water proof
<h2>
Answer:</h2>
The <u>interstellar medium</u> is the content of matter and energy that exists between stars within a galaxy.
In this sense, two components can be distinguished in the interstellar medium: dust particles and gas.
Dust represents 1% of the interstellar medium in mass, while the gas (consisting mainly of hydrogen and helium) represents 99% of the mass of the interstellar medium.
It should be noted that the interstellar matter is not uniformly distributed but is concentrated in molecular clouds.
Answer:
Michael's final velocity is 19.62 m/s.
Explanation:
We can find the final velocity of Michael by using the following kinematic equation:
(1)
Where:
: is the final velocity =?
: is the initial velocity = 1.62 m/s
a: is the acceleration = 1.2 m/s²
t: is the time = 15 s
By entering the above values into equation (1) we have:
Therefore, Michael's final velocity is 19.62 m/s.
I hope it helps you!
