Answer:
F = 51 10² N and The force applied is 11.6 times greater than the weight
Explanation:
As we are asked the force we can use Newton's second law and we calculate the acceleration by kinematics
y = v₀ t + ½ a t²
On the ground its initial velocity is zero (v₀ = 0)
y = ½ a t²
a = 2y / t²
a = 2 2.5 / 0.21²
a = 113.38 m / s²
We calculate the force
F = ma
F = 45 113.38
F = 5102 N
F = 51 10² N
For the relationship of this force with the weight, divide the two
F / W = 51 10²/45 9.8
F / W = 11.6
The force applied is 11.6 times greater than the weight
The solid cylinder reaches the bottom first.
A solid object will always roll down the ramp faster than a hollow object of the same shape regardless of their exact mass or diameter.
The solid cylinder has a lower moment of inertia than the hollow one does. Although they have the same mass, all the hollow cylinder's mass is concentrated around its outer edge so its moment of inertia is higher.
The velocity would be greater for the material with radius of gyration k is lower of for which the moment of inertia is lower. Solid cylinder with k as 1/2 will have greater velocity as compared to hollow cylinder which has k as 1. As they have same mass and radius their energies at both the levels would remains same including the potential energy and energy lost due to friction.
learn more about moment of inertia from here: brainly.com/question/28167913
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Answer:b)1770 kWh
Explanation:
Given
volume of water
Temperature rise
also 1 kg mass is approximately is 1 gallon
therefore 40,000 gallon is equivalent to 3.8\times 40000 kg
heat Required to raise temperature is
Answer:
I t hi ink the answer is a
Explanation:
I hoped this helpes