4.A car completes at the maximum possible speed without sliding completes one lap in 14.3 s around a circular track with a radius of 50.0 m. What is the speed at which the car goes around the corner?

Given:
T =
R =
Unknown:
v=?
Equation:
v=2*pi*r/T

I HOPE THESE EXAMPLES HELP

A concrete highway curve of radius 80.0 m is banked at a 17.0 degrees. What is the maximum speed with which a 1800 kg rubber-tired car can take this curve without sliding? (Take the static coefficient of friction of rubber on concrete to be 1.0.  1000 kg car is going around a curve with radius 30 meters. If the coefficient of friction between the car's tires and the road is 0.5, what is the maximum speed at which the car can make the turn? Solution: mass of car, m = 1000 kg; radius of curve, r = 30 m; coefficient of friction, = 0.5; free-fall acceleration, g = 9.8 m/s 2

Explanation:

SORRY BUT I DONT UNDERSTAND THE SYMBOLE CAN YOU TRY A PICTURE

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: