Answer:
Power, P = 18224 watts
Explanation:
It is given that,
Mass of car, m = 1400 kg
Speed of the car, v = 26.8 m/s
The frictional force exerted by the road on the car’s tires, F = 680 N
We need to find the rate of doing work by the air and the road on the car. We know that rate of doing work is called power exerted. It is equal to the product of force and velocity. It is given by :
P = 18224 watts
So, the power delivered by the air and the road on the car is 18224 watts. Hence, this is the required solution.
Answer:
Explanation:
The direction of a magnetic field indicates where the magnetic inluence on the electric charges are directed to.
From the given question, we are to determine the direction of the magnetic field bnet at a point A.
Also, having the notion that the currents in the two wires have equal magnitudes, Then:
Thus; points out of the screen at A.
Answer:
The torque in the coil is 4.9 × 10⁻⁵ N.m
Explanation:
T = NIABsinθ
Where;
T is the torque on the coil
N is the number of loops = 9
I is the current = 7.8 A
A is the area of the circular coil = ?
B is the Earth's magnetic field = 5.5 × 10⁻⁵ T
θ is the angle of inclination = 90 - 56 = 34°
Area of the circular coil is calculated as follows;
T = 9 × 7.8 × 0.0227 × 5.5×10⁻⁵ × sin34°
T = 4.9 × 10⁻⁵ N.m
Therefore, the torque in the coil is 4.9 × 10⁻⁵ N.m