Answer:
Part a)
Part b)
Part c)
Explanation:
As we know that car start from rest and reach to final speed of 87 mph
so we have
now we have
Part a)
acceleration is rate of change in velocity
Part b)
distance moved by car with uniform acceleration is given as
Part c)
As we know that the car start from rest
so final speed after t = 10 s
Answer:
D
Explanation:
All the other answers are false scientist make frequent mistake in there hypothesis B. is a opinion so is C
And a scientist job is to study and OBSERVE a field of science
Newton's law of universal gravitation states that a particle attracts every other particle in the universe using a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them
Answer:
dx/Dt x B . x =0
Explanation:
Let's calculate the work and the magnetic force, the expression for magnetic force is
F = qv x B
Bold indicate vector quantities, the expression for the job is
W = F. X
Let's replace in this equation
W = q v x B . X
The definition of speed is
v = dX / dt
With what work is left
W = q dX / dt x B . X
As we can see the vector product gives us a vector perpendicular to dX and its scalar product by X of zero
Second part
The speed a vector and although the magnitude is constant the change of direction implies a change in the speed.
Let's calculate the magnitudes of speed (speed)
F = qv B sin θ
F = ma
q v B sin θ = ma
a = qvB / m senT
This acceleration is perpendicular to the magnetic field and the velocity, so it does not change if magnitude but its direction, it is directed to the center of the circle.
| v | = q vB/m sin θ
