In: Physics

# describe how you can use a magnet to exert both a contact force and a non-contact...

describe how you can use a magnet to exert both a contact force and a non-contact force on another magnet?

## Solutions

##### Expert Solution

Contact forces occur when the two objects interacting with each other (exerting forces on each other) are physically in contact with each other (touching each other). Most forces are like this (for me to push on a box, I have to physically go up to the box, touch it, and push it).

Non-contact forces occur when the objects are not physically touching, but still exert forces on each other. The one everyone has the most experience with is the gravitational force. If I drop a ball, the gravitational pull of the earth pulls the ball down, even though the earth isn't physically touching the ball. There is a gravitational field created by the earth that pulls on the ball.

It is the same for electric forces between two charged objects (there is an electric field created that interacts with the other charged object) and with magnetic forces (there is a magnetic field created by a magnet that interacts with another magnet - or a moving electric charge). The two objects do not need to physically be touching, which is why it is called a non-contact force.

## Related Solutions

##### How much force could you exert on a large crate if you wanted to get it...
How much force could you exert on a large crate if you wanted to get it moving? One thing the answer depends on is whether you can keep your footing. a) Imagine someone on level ground, pushing horizontally against a crate, with enough effort that their feet are about to start slipping. Nevertheless, the crate hasn't started moving. What type of force is the crate exerting on the person pushing on it, and how does the magnitude of this force...
##### The largest downward force you can exert on a certain multiple pulley system = 777 N....
The largest downward force you can exert on a certain multiple pulley system = 777 N. When you move the rope 3.5 m, the object moves 0.35 m. What is the heaviest object you could lift? Could it lift a cow that's 1600 lbs?
##### In this problem you will determine the amount of force a rider needs to exert on...
In this problem you will determine the amount of force a rider needs to exert on a bicycle pedal to accelerate at a rate of 1.0 m/s^2. (c) Now consider the system consisting of the rear wheel. The system includes the sprocket (gear wheel) attached to it. Assume that the rear sprocket has a radius of 2.5 cm and neglible mass compared to the wheel. Assume that the rear wheel has the same mass, radius, and moment of inertia as...
##### How do you imagine you can increase the magnet field from a magnet (Faraday's Law)?
How do you imagine you can increase the magnet field from a magnet (Faraday's Law)?
##### When a magnet moves relative to a conducting, non-magnetic material (such as copper), some force slows...
When a magnet moves relative to a conducting, non-magnetic material (such as copper), some force slows down the magnet, and this is attributed to "eddy current." Describe in your own words what this "eddy current" is, how it is caused, and how this eddy current affects the magnet which caused it. In the demonstrations of eddy current, these demonstrations involve non-conservation of mechanical energy. You see: (1) large magnet slowing down to a stop at the end of a short...
##### You exert a constant force of 20N up the slope on a 20kg block sitting on...
You exert a constant force of 20N up the slope on a 20kg block sitting on a slope of an angle 45 degrees with a coefficient of static friction of .3 and a coefficient of kinetic friction or .15. Will the block move? If so, what will it's acceleration be once it's moving?
##### Water is both a powerful force and critical to an organism’s survival. Explain how this can...
Water is both a powerful force and critical to an organism’s survival. Explain how this can be true of water, by providing a detailed example of each situation (including the chemistry aspect as needed). There is a wide variety of survival strategies used by terrestrial organisms. Explain the difference between ectotherms and endotherms, and an example organism for each. Many organisms live in environments that experience large changes, giving them seasons. Explain the differences between diapause, hibernation, and torpor. Provide...
##### Demonstrate and describe how each magnet type works.
Demonstrate and describe how each magnet type works.
##### A telephone sales force can model its contact with customers as a Markov chain. The six...
A telephone sales force can model its contact with customers as a Markov chain. The six states of the chain are as follows: State 1 Sale completed during most recent call State 2 Sale lost during most recent call State 3 New customer with no history State 4 During most recent call, customer’s interest level low State 5 During most recent call, customer’s interest level medium State 6 During most recent call, customer’s interest level high Based on past phone...
##### 1. At the level of the atom, both electric force and gravitational force can be evaluated...
1. At the level of the atom, both electric force and gravitational force can be evaluated for the interaction between protons and electrons. Which is dominant? a. The gravitational force b. The electric force c. Both forces are approximately equal d. Neither force is very strong at the atomic level e. Two of the above are correct 2. A student rubs a balloon in her hair then holds the balloon against a wall and finally releases it after a moment....