Answer:D
Explanation: acorrding to my calculation of my 8th grade education with the proxsimity of the y=mx+b you will get -397758.4837y483 now you multiply that times pi which is 3.145926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 and you get 42066669 divide that by 3 and you get D
Answer:
520 N
Explanation:
Work is the dot product of the force vector and displacement vector.
W = F · x
This means it is the product of the magnitudes of the vectors and the cosine of the angle between them.
W = F x cos θ
The displacement of the soil is 15 m up. The force is parallel to the ramp. So the angle between the vectors is 90° − 35° = 55°.
Plugging in the values and solving for F:
4500 J = F (15 m) (cos 55°)
F = 523 N
Rounded to two significant figures, the force is 520 N.
Answer:
I think it is 5 but correct me if I'm wrong
Explanation:
Answer:
Velocity 
V = Q + 3Rt²
at t = 0, 
= Q + 3r(0) ==> Q
at t = T, 
= Q + 3rT²
Work done (W) = ΔKE = 
W = ![\frac{1}{2} m[(Q + 3RT^{2})^{2} - Q^{2}]](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%20m%5B%28Q%20%2B%203RT%5E%7B2%7D%29%5E%7B2%7D%20-%20Q%5E%7B2%7D%5D)
W = 
[Q² + 9R²T⁴ + 2Q(3RT²) - Q²]
W = (9R²T⁴ + 6QRT²)
Explanation:
Differentiate the position.
Find the equation for speed.
Find the initial and final speed.
Use work energy theorem to find the work done by finding the change in kinetic energy.
Answer:
Explanation:
According to Newton 2nd law of motion: F = ma where m is the mass of the moon and a is the centripetal acceleration of the gravitational force.
Also Gravitational force formula
where G is the gravitational force, ME is the mass of Earth and S is the mean distance between Earth and Moon.
As the moon is at constant circular motion around Earth, there forces balance out:
We can now substitute 
and 
and 
