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blueblast
Moved from a technical forum, so homework template missing
Could someone please provide a diagram of all the forces acting on the plane, and explain why the answer is E?
This is from the 2014 F=MA exam.
Thanks,
blueblast
NFuller said:The only force the ball can exert on the plane is its weight, which points straight down.
blueblast said:Could someone please provide a diagram of all the forces acting on the plane, and explain why the answer is E?
You're right, apparently I'm too distracted right now to think straight...conscience said:This is completely wrong .
conscience said:This is completely wrong .
What are your thoughts on this ?
Draw a free body diagram listing all the forces on the ball ? Think carefully about the condition that the ball rolls without slipping on the inclined plane .
blueblast said:But where did gravity go?
conscience said:Is force due to gravity on the ball exerted by the inclined plane ?
Note : You have been asked to find the direction of force by the ball on the inclined plane .
blueblast said:The gravity on the ball is not exerted by the plane, but doesn't it still have a weight that pushes down on the plane?
It's getting clearer to me now, but I'm still confused about gravity. If I'm lying down, and someone puts a heavy book on my back, wouldn't I feel the book pushing down on me?conscience said:This is not how you think . Weight is not the force by which the ball pushes on the plane .Weight is the force of gravity exerted by Earth .
It is the Normal force from the ball which pushes the inclined plane in a direction perpendicular to the plane .And it is the frictional force from the ball which exerts a force along the inclined plane surface .
blueblast said:It's getting clearer to me now, but I'm still confused about gravity. If I'm lying down, and someone puts a heavy book on my back, wouldn't I feel the book pushing down on me?
conscience said:You definitely would feel book pushing down on you .
Earth pulls you towards its center by exerting a gravitational force .Earth also pulls the book towards its center .Due to this a Normal contact force develops between you and the book , as well as between you and the floor .It is this Normal force from the book which you feel as the force from the book which pushes you down .
The normal force from the floor pushes you up .
blueblast said:So regarding just me and the book, I would push up on the book(normal force). Then, the reaction force of the book pushing on me would be what I feel.
Is this right?
What you actually feel are nerve impulses caused due to the strain in your skin and muscles that are supporting the book.blueblast said:So regarding just me and the book, I would push up on the book(normal force). Then, the reaction force of the book pushing on me would be what I feel.
The weight of a ball affects the force it exerts on a plane through the principle of action and reaction. When the ball is dropped onto the plane, it exerts a downward force on the plane due to its weight, and the plane exerts an equal and opposite force on the ball, causing it to bounce off the plane.
The faster the ball is moving, the greater the force it will exert on the plane upon impact. This is because the momentum of the ball increases with its speed, resulting in a stronger force being exerted on the plane.
Yes, the angle at which the ball hits the plane can affect the force it exerts. If the ball hits the plane at a perpendicular angle, the force will be evenly distributed. However, if the ball hits the plane at an angle, the force will be concentrated on a smaller area, resulting in a stronger impact force.
The mass of the ball directly affects the force it exerts on the plane. A heavier ball will exert a greater force on the plane compared to a lighter ball, assuming they are both travelling at the same speed and hit the plane at the same angle.
Yes, there is a limit to the force that a ball can exert on a plane. This is determined by the strength and durability of the materials used to construct the plane. If the force exceeds this limit, it can cause damage to the plane.