Science Essays

What force could be applied to the box to make the net force in the horizontal direction zero? Explain. F Friction = 50 N F Applied = 100 N F Normal = 25 N F Gravity = 25 N

Applying a force of 50N friction to the box could make the net force in the horizontal direction zero because applying this force to the original friction force would be even with the applied force. This means, the box would stay put horizontally. 50N+50N = 100N - 100N = 0N.

The following free body diagram shows the forces acting on a box. F Friction = 50 N F Applied = 100 N F Normal = 25 N F Gravity = 25 N Explain how you can calculate the net force in any direction on the box.

I can calculate the net force in any direction on the box by figuring out the directions of the forces involved. When forces act in the same direction, you simply add them together to determine the net force. When forces act in opposite directions, you subtract the smaller force from the larger force to determine the net force. Any object will move to the greater force.

Suppose a force of 25 N to the right is added to the box. What will be the net force to the right? F Friction = 50 N F Applied = 100 N F Normal = 25 N F Gravity = 25 N

125N-50N= 75N. The net force to the right would be 75N to the right.

Explain centripetal acceleration; include an example and the following terms in your answer: velocity, direction, steady speed, and circular motion.

An object changing direction of motion experiences acceleration even when it has a steady pace. For example, a car that makes a sharp turn. The direction of velocity changes from "forward" to "left." This change in velocity is an acceleration, even if the speed does not change. As the car finishes the turn, the acceleration drops to zero. An object traveling in circular motion is always changing its direction, so it always experiences acceleration. Acceleration in circular motion is known as centripetal acceleration.

Describe the proportional relationships between the gravitational force and mass and distance. Will doubling mass or doubling distance have a greater effect on the gravitational force? Explain.

The law of universal gravitation relates gravitational force, mass, and distance. It states that all objects attract each other through gravitational force. The strength of the force depends on the masses involved and distance between them. The gravitational force between two objects increases as the distance between their centers decreases. This means that objects far apart have a weaker attraction than objects close together. If two objects move closer, the attraction between them increases. The gravitational force between two objects increases with the mass of each object. This means that objects with greater mass have more attraction between them. Doubling mass will have a greater effect on gravitational force because there is more attraction. Gravitational force weakens as the distance between two masses increases. Gravitational force is weaker between objects that have small masses. Gravitational force is stronger when one or more objects are more massive. g= m/d2 ; g = gravity.

Suppose an upward force of 15 N is added to the box. What will be the net vertical force on the box? F Friction = 50 N F Applied = 100 N F Normal = 25 N F Gravity = 25 N

The net vertical force on the box would be 15N normal. 25N-25N = 0+15N = 15N up.