Can you help please
Question1: A car makes a banked turn on a "real" road (meaning you can not ignore friction), which of the following are forces that act on the car:
(for full credit you must select ALL that are true)
A)centripetal force
B) friction
C) normal force from the road
D) weight of the car
Question 2: You are pulling a sled along a flat stretch of snow. You are pulling on the rope such that it makes an angle of 30 degrees up from the horizontal. What is the correct relationship in this case between the normal force from the ground on the sled and the weight of the sled?
A)they are equal
B) the normal force is greater than the weight
C) the normal force is less than the weight.
D) it depends on whether or not your are accelerating the sled
Question 1: To determine the forces that act on a car making a banked turn on a real road, we need to consider the various forces involved.
A) The centripetal force is definitely present as it is responsible for keeping the car moving in a curved path.
B) Friction is also a force that acts on the car. Friction between the tires and the road provides the necessary lateral force to keep the car on the road during the turn.
C) The normal force from the road is the force exerted by the road surface perpendicular to the car's tires. It plays a vital role in balancing the weight of the car and providing vertical support.
D) The weight of the car, which is the force exerted downward due to gravity, is also present.
Therefore, the correct answer is A) centripetal force, B) friction, C) normal force from the road, and D) weight of the car.
Question 2: We have a sled being pulled along a flat stretch of snow, with the pull being at an angle of 30 degrees up from the horizontal. Let's consider the relationship between the normal force from the ground on the sled and the weight of the sled.
A) If the sled is at rest or moving with a constant speed along the snow, the normal force and the weight of the sled must be equal in magnitude. This is because the sled is not accelerating, and the vertical forces are balanced.
B) If the normal force is greater than the weight, it would imply an upward acceleration. However, this is not the case for a sled being pulled along a flat stretch of snow with a constant speed.
C) If the normal force is less than the weight, it would imply a downward acceleration. Similarly, this is not applicable to the given scenario.
D) The relationship between the normal force and the weight of the sled does not depend on whether or not you are accelerating the sled. Instead, it relies on the fact that the sled is being pulled at an angle of 30 degrees up from the horizontal.
Therefore, the correct answer is A) they are equal.