Potential energy is high and kinetic is equal i believe.
Answer:
970.2 N
Explanation:
We are given that
Length of ladder=2.7 m
Mass,M=11 kg
Coefficient of friction=
Mass of painter=8M
Distance from base=d
We have to find the magnitude of the normal force exerted by the floor on the ladder.
Normal force exerted by floor on the ladder=
Where
Normal force exerted by floor on the ladder=
Answer:
197.5072.
Explanation:
According to the Coulomb's law, the magnitude of the electrostatic force of interaction between two charges and which are separated by the distance is given by
<em>where,</em> k is the Coulomb's constant.
For the case, when,
Then, using Coulomb's law,
For the case, when,
Then, using Coulomb's law, the new electric force between the charges is given by,
We have that the maximum rank of the kangaroo is given by:
R = v0 ^ 2 sin (2θ) / g
where,
v0 = initial velocity
θ = angle of the velocity vector formed from the horizontal
g = gravity
Clearing the speed we have:
v0 ^ 2 = (R * g) / (sin (2θ))
Substituting values
v0 = root (((11) * (9.8)) / (sin (2 (21 * (pi / 180)))))
v0 = 12.69 m / s
answer
its takeoff speed is 12.69 m / s
The light collecting area of 140 m telescope is 196 times greater than 10 m telescopes.
The light collecting area is directly proportional to square of aperture:
A ∝ l²
Aperture of Keck Telescope = l₁ = 10 m
Aperture of 11 m telescope, l₂ = 140 m
Light collecting area of Keck telescope = A₁
Light collecting area of 110 m telescope = A₂
A₁ ∝ l₁²
A₂ ∝ I₂²
A₂/A₁ = I₂²/ l₁² = (140 m)²/(10 m)² = 196
Therefore, the light collecting area of 140 m telescope is 196 times greater than 10 m telescope.
To know more about telescope, refer: brainly.com/question/14393136
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