Physical Science B
Non-Contact Forces Unit Test
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1. What is a force?
2. How do non-contact forces differ from contact forces?
3. Give an example of a non-contact force.
4. What is gravity and how does it affect objects?
5. Describe the relationship between the distance between two objects and the strength of the gravitational force between them.
6. What is electrostatic force?
7. What is magnetic force?
8. Give an example of a force that is both contact and non-contact.
9. What is the formula for calculating force?
10. Explain how Newton's laws of motion apply to non-contact forces.
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1. What is a force?
A force is a push or pull on an object that causes it to change its state of motion.
2. How do non-contact forces differ from contact forces?
Non-contact forces act on objects from a distance without physical contact, while contact forces require physical contact between objects to exert a force.
3. Give an example of a non-contact force.
An example of a non-contact force is gravity, which affects objects without physical contact.
4. What is gravity and how does it affect objects?
Gravity is the force of attraction between any two objects that have mass. It affects objects by pulling them towards each other.
5. Describe the relationship between the distance between two objects and the strength of the gravitational force between them.
The strength of the gravitational force between two objects decreases as the distance between them increases.
6. What is electrostatic force?
Electrostatic force is the force between two charged objects.
7. What is magnetic force?
Magnetic force is the force between two magnets or between a magnet and a magnetic object.
8. Give an example of a force that is both contact and non-contact.
An example of a force that is both contact and non-contact is the force of air resistance on a falling object. The air molecules exert a force on the object without physical contact, but the object is also in physical contact with the air.
9. What is the formula for calculating force?
The formula for calculating force is: F = ma, where F is force, m is mass, and a is acceleration.
10. Explain how Newton's laws of motion apply to non-contact forces.
Newton's laws of motion apply to non-contact forces because they govern the behavior of all forces acting on objects, whether or not the forces are in physical contact. For example, the second law of motion applies to gravitational forces, where the force of gravity on an object is equal to its mass times its acceleration due to gravity.