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
No one has answered this question yet.
Q1: A,B,C,D.
Q2: A.
Sure, I'd be happy to help you with these physics questions!
Question 1: In a banked turn on a "real" road, the forces that act on the car are:
A) Centripetal force: This force is required to keep the car moving in a curved path. It is directed towards the center of the turn and is responsible for changing the car's direction.
B) Friction: Friction plays a crucial role in a banked turn because it provides the necessary centripetal force. In a banked turn, static friction acts towards the center of the turn and provides the centripetal force needed to keep the car on the curve.
C) Normal force from the road: The normal force is the force exerted by a surface to support the weight of an object resting on it. In a banked turn, the car is on an inclined plane, and the normal force has both vertical and horizontal components. The vertical component of the normal force balances the weight of the car, while the horizontal component provides the necessary frictional force for the turn.
D) Weight of the car: Weight is the force exerted by gravity on an object with mass. Since the car is on an inclined plane during a banked turn, its weight has both vertical and horizontal components. The vertical component contributes to balancing the normal force, while the horizontal component is not directly related to the turn but influences the centripetal force indirectly through friction.
So the correct answer for Question 1 is: A) centripetal force, B) friction, C) normal force from the road, and D) weight of the car.
Question 2: When pulling a sled along a flat stretch of snow at an angle of 30 degrees up from the horizontal, the relationship between the normal force from the ground on the sled and the weight of the sled depends on whether or not you are accelerating the sled.
A) If you are not accelerating the sled and it is moving with a constant velocity, the net force on the sled is zero. In this case, the normal force is equal to the weight of the sled (since acceleration is zero).
B) If you are accelerating the sled, there is an additional force acting in the direction of your pull. In this case, the normal force will be greater than the weight of the sled since there is an extra force contributing to the total force.
C) If the sled is decelerating, then the normal force will be less than the weight of the sled.
So the correct answer for Question 2 is: D) It depends on whether or not you are accelerating the sled.
I hope this helps! Let me know if you have any further questions.