The graph is showing a constant velocity as the line is horizontal. The initial speed is equal to the final speed as there is no changing in acceleration. The second statement is the correct statement
Initial = 2.5 m/s
Final = 2.5 m/s
It is B. the potential difference is the battery is 5 V
Answer:
The magnitude of the current flowing through the wire is 7 A.
Explanation:
Given that,
Radius of the circular loop, r = 4 mm = 0.004 m
Magnetic field at the centre of the loop, B = 1.1 mT
We need to find the magnitude of the current flowing through the wire. The magnetic field at the center of the loop is given by the formula as follows :
So, the magnitude of the current flowing through the wire is 7 A.
Answer:
Work Done = 67.5 J
Explanation:
First we find the value of spring constant (k) using Hooke's Law. Hooke's is formulated as:
F = kx
where,
F = Force Applied = 450 N
k = Spring Constant = ?
x = Stretched Length = 30 cm = 0.3 m
Therefore,
450 N = k(0.3 m)
k = 450 N/0.3 m
k = 1500 N/m
Now, the formula for the work done in stretching the spring is given as:
W = (1/2)kx²
Where,
W = Work done = ?
k = 1500 N/m
x = 70 cm - 40 cm = 0.3 m
Therefore,
W = (1/2)(1500 N/m)(0.3 m)²
<u>W = 67.5 J</u>
Answer:
Explanation: The short answer is that velocity is the speed with a direction, while speed does not have a direction. Speed is a scalar quantity—it is the magnitude of the velocity. Speed is measured in units of distance divided by time
