A car accelerates at 3 m/s*2. Assuming the car starts from rest, how much time does it need to
2 answers:
We are given with some parameters used in Kinematics for determining the motion of an object.
- Accleration = 3 m/s²
- Started from rest (Initial vel.) = 0 m/s
- Final velocity = 12 m/s
We have to find the time taken by the car to attain the final velocity with the given accleration. By using 1st equation of motion which says:
- v = u + at
Final velocity = Initial velocity + Accl. × Time taken
Plugging the values,
➝ 12 = 0 + 3(t)
➝ 3t = 12
➝ t = 4 s
So, the correct answer is Option C. And we are done...
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Answer:
The magnitude of the magnetic field at the center of the loop is 3.846 x 10⁻⁵ T.
Explanation:
Given;
number of turns of the flat circular loop, N = 18 turns
radius of the loop, R = 15.0 cm = 0.15 m
current through the wire, I = 0.51 A
The magnetic field through the center of the loop is given by;
Where;
μ₀ is permeability of free space = 4π x 10⁻⁷ m/A
Therefore, the magnitude of the magnetic field at the center of the loop is 3.846 x 10⁻⁵ T.