Acar enters a 300-m radius horizontal curve on a rainy day when the coefficient of static friction between its tires and the road is 0.600. what is the maximum speed at which the car can travel around this curve without sliding?

To solve this problem it is necessary to take into account the concepts related to Centripetal Force and Friction Force.

In the case of the centripetal force, we know that it is defined as

Where,

m=mass

v= velocity

r= Radius

In the case of the Force of Friction we have to,

Where,

Friction Constant

m= mass

g= gravity

According to the information given, the centripetal force must be less than or equal to the friction force to stay on the road, in this way

Re-arrange to find the velocity,

Therefore la velocidad del carro debe ser igual o menor a 42m/s para mantenerse en el camino

change tension

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.