Questions and Answers
What is acceleration?
a change in speed or direction
What causes acceleration?
a force
What is a force?
a push or a pull on an object
What is used to measure a force? How is it defined?
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What force measuring device did we use in class?
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What is a vector and what information does it convey?
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What are opposing forces?
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What is tension?
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What must be done to a spring scale before using it? Explain how it's done.
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What do speeding up, slowing down, and changing direction all have in common?
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What is magnitude?
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How many objects are required to produce a force?
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Define net force. What does it produce? AKA?
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What are different ways of saying acceleration?
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What is the net force when forces are balanced?
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What causes forces to be balanced?
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When forces on an object are balanced, how is the object described?
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What is the net force when forces are unbalanced? What happens?
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What happens if the forces acting on an object are in the same direction?
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What happens if the forces acting on an object are in opposite directions?
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What happens if the forces are in multiple directions?
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What will happen to a moving object if the forces acting on it are balanced?
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What will happen to a motionless object if forces acting on it are balanced?
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What will happen to a moving object if the forces acting on it are unbalanced?
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What will happen to a motionless object if the forces are unbalanced?
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Study Notes
Key Concepts of Forces and Acceleration
- Acceleration refers to a change in speed or direction of an object.
- Force is defined as a push or pull acting on an object, and acceleration requires the application of force.
- Measurement of force is done in newtons (N), where 1N equals the gravitational force on a 100g object.
- In class, a spring scale was used to measure force, demonstrating the relationship between force and the weight of an object.
Representing Forces
- A vector represents force using an arrow, indicating both its direction and magnitude.
- Opposing forces occur when two forces act against each other, potentially leading to balance or unbalance.
Tension and Force Measurements
- Tension is a type of force transmitted through a material when pulled, resulting in stretching.
- Before using a spring scale, it is crucial to zero the scale to ensure accurate measurements, where pulling a tab sets 1N to equal 100g.
Understanding Net Force
- Net force is the total of all forces acting on an object, which determines its acceleration, also known as the resultant force.
- When forces are balanced, the net force equals 0N, resulting in no change in the object's state of motion.
- Equilibrium describes the state of an object when forces acting on it are balanced.
Effects of Forces on Motion
- An object with unbalanced forces will experience acceleration, with a net force greater than 0N.
- If forces act in the same direction, the object accelerates in that direction.
- For forces acting in opposite directions, the stronger force prevails, causing acceleration toward the greater force.
- Forces acting in multiple directions may cancel each other out, with the net force determining the object's acceleration.
Motion Dynamics
- A moving object under balanced forces maintains its motion, continuing in a straight path at constant speed.
- A motionless object under balanced forces remains at rest.
- If forces on a moving object are unbalanced, it will accelerate.
- A motionless object will begin to move if influenced by unbalanced forces.
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