The efficiency can never be 100 because some of the work will be transferred into thermal energy. In turn, causing the percentage to decrease. This is basically the second law of thermodynamics.
Answer:
When a force acts on an object that is stationary or not moving, the force will cause the object to move, provided there are no other forces preventing that movement. If you throw a ball, you are pushing on it to start its movement. If you drop an object, the force of gravity causes it to move.
<em>hope this helps :)</em>
Answer:
I = (5.71 i ^ + 6.99j ^) N s
Explanation:
The concept of impulse is very useful for problems where shocks occur, the impulse is equal to the change of moment of the system
I = Δp = m -m v₀
Let's fix an xy coordinate system, where y is vertical and we decompose the velocities
Initial
sin (-40) = / vo
cos (-40) = v₀ₓ / Vo
= 17.0 sin (-40)
= -10.93 m / s
Vox = 17 cos (-40)
Vox = 13.02 m / s
Final
sin 30 = / vf
cos 30 = / Vf
= 48.0 sin30
= 24.0 m / s
= 48 cos 30
= 41.57 m / s
Let's calculate the momentum on each axis
X axis
Iₓ = m -m
Iₓ = 0.200 (41.57 - 13.02)
Iₓ = 5.71 N s
Axis y
= m - m
= 0.2000 (24 - (-10.93))
= 6.99 N s
I = (5.71 i ^ + 6.99j ^) n s
The temperature of the surface is between 3,500-20,00
supregiants would be around the top half for the y axis
and it would be a little in the middle for the x axis <span />