To calculate density, both _____ must be measured
2 answers:
You might be interested in
The coefficient of sliding friction is 0.514
Explanation:
We start by writing the equations of motion of the elephant along the two directions, parallel and perpendicular, to the incline.
Along the parallel direction we have:
(1)
where :
F = 10,000 N is the force applied by Noah
is the component of the weight parallel to the incline, where:
m is the mass
g = 9.8 m/s^2 the acceleration of gravity
is the angle of incline
is the force of friction, where:
is the coefficient of friction
R is the normal reaction
and a is the acceleration
Perpendicular direction:
(2)
where is the component of the weight perpendicular to the incline
From (2) we find
And substituting into (1)
We know that the elephant moves at constant speed, so the acceleration is zero:
a = 0
So the equation becomes
And we can re-arrange it to find the coefficient of friction:
Learn more about friction and inclined planes:
#LearnwithBrainly
Answer:
There is a constant emf induced in the loop.
Explanation:
In the uniform magnetic field suppose the rectangular wire loop of length L and width b is moved out with a uniform velocity v. suppose any instance x length of the loop is out of the magnetic field and L-x length is inside the loop.
Area of loop outside the field = b(L-x)
we know that flux φ= BA
B= magnitude of magnetic field , A= area
and emf
B,b and L are constant and dx/dt = v
⇒ε = -Bbv
which is a constant hence There is a constant emf induced in the loop.