Engineers are designing a curved section of a highway. If the radius of curvature of the curve is 173 m, at what angle should th
e curve be banked so that a car traveling at 29.0 m/s will stay on the road without the aid of frictional forces?
1 answer:
Answer: The angle Ø = 26
Explanation:
The weight and the normal force of the road are the only two external forces acting on the car. A frictionless surface can only exert a force that is perpendicular to the surface. This is a normal force.
Since the car does not leave the surface of the road, the vertical components of the two external forces must be equal in magnitude and opposite in direction. Whereas ;
Horizontal component = centripetal force. While
The vertical component = Mg
Revolving the two components gives: tanØ = V^2/rg
Please find the attached file for the solution
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Answer:
(a) The ratio of turns in the primary and secondary coils of her transformer is 1.833
(b) The ratio of input to output current is 0.55
(c) To increase the output voltage, you can either increase the number of turns in the secondary coil (step-up) or increase the input current. Therefore, the Chinese person has to increase the input current of the transformer to achieve an increased output voltage that can power her 220 V appliances.
Explanation:
Given;
input voltage, = 220 V
output voltage, = 120 V
General transformer equation is given as;
where;
Np is number of turns in the primary coil
Ns is number of turns in the secondary coil
Is - is the secondary current or output current
Ip - is the primary current or input current
(a) The ratio of turns in the primary and secondary coils of her transformer;
(b) The ratio of input to output current;
(c) To increase the output voltage, you can either increase the number of turns in the secondary coil (step-up) or increase the input current. Therefore, the Chinese person has to increase the input current of the transformer to achieve an increased output voltage that can power her 220 V appliances.