Answer:
5 miles a second
Explanation:
20 divided by 4
hope it helps and for brainliest :)
Answer:
187.5 V and the direction is counter clockwise
Explanation:
N = 50 turns, A1 = 0.25 m^2, A2 = 0, dt = 0.1 s
dA = A2 - A1 = 0.25 m^2, B = 1.5 T
induces emf, e = rate of change of magnetic flux linked with the coil
e = N x d (B A) / dt
e = N x B x dA/dt
e = 50 x 1.5 x 0.25 / 0.1 = 187.5 V
According to the Lenz law the direction of induced emf is such that it always opposes the responsible reason due to which it is produced.
So, the direction of induced emf is counter clock wise.
Answer: the frequency of the oscillation is given by ω=√(k/m)=√(18.9/2.5)=2.75. Keep in mind this is angular frequency, i.e. radians per second, not wavelengths per second. So the displacement can be written in the form
y = R*sin(2.75*t - δ)
Here δ is just the time offset and for our purposes is pretty irrelevant. You can in fact set it to zero since we can say we begin timing when the mass crosses equilibrium. So
y = R*sin(2.75*t)
We want to find a way to use the information "At the equilibrium position, it moves 2.89 m/s." I am going to use some calculus here since it makes things so much easier. If you haven't taken calculus yet, most likely your course has given you a formula to use instead.
We know y=0 when t=0, so y is at equilibrium when t=0. To say it moves 2.89 m/s is then to say that
y'(0) = 2.89.
From here we can differentiate the displacement function, set t=0 and solve for R. Using the chain rule:
y'(t) = 2.75*R*cos(2.75*t)
y'(0) = 2.75*R
2.75*R = 2.89
R = 1.051
Explanation: Since this is harmonic motion we can assume there is no damping force
The object that had the most 1000 ton weight has the most momentum