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Questions and Answers
A stationary hockey puck is struck by a hockey stick, causing it to slide across the ice. Once the puck is moving, what factor least affects its constant velocity, assuming negligible air resistance?
A stationary hockey puck is struck by a hockey stick, causing it to slide across the ice. Once the puck is moving, what factor least affects its constant velocity, assuming negligible air resistance?
- The inertia of the puck.
- The mass of the puck.
- The friction between the puck and the ice.
- The force applied by the initial strike. (correct)
A car is traveling at a constant velocity. Which statement accurately describes the net force acting on the car?
A car is traveling at a constant velocity. Which statement accurately describes the net force acting on the car?
- The net force is proportional to the car's velocity.
- The net force is equal to the force applied by the engine.
- The net force is zero. (correct)
- The net force is in the direction of motion.
Which of the following scenarios best illustrates the concept of inertia?
Which of the following scenarios best illustrates the concept of inertia?
- A rocket expels hot gases to accelerate into space.
- A ball rolling down a hill gradually speeds up due to gravity.
- A parachute slowing down a skydiver as they descend.
- A magician pulling a tablecloth from under dishes, leaving them undisturbed. (correct)
Considering two otherwise identical objects, one on Earth and one on the Moon, which statement about their inertia is most accurate?
Considering two otherwise identical objects, one on Earth and one on the Moon, which statement about their inertia is most accurate?
A book is at rest on a table. Which of the following statements accurately describes the forces acting on the book?
A book is at rest on a table. Which of the following statements accurately describes the forces acting on the book?
What differentiates contact forces from non-contact forces at a fundamental level?
What differentiates contact forces from non-contact forces at a fundamental level?
A skydiver jumps from an airplane. Initially, air resistance is minimal, but as the skydiver's speed increases, air resistance also increases. Eventually, the skydiver reaches terminal velocity. What is true about the forces acting on the skydiver at terminal velocity?
A skydiver jumps from an airplane. Initially, air resistance is minimal, but as the skydiver's speed increases, air resistance also increases. Eventually, the skydiver reaches terminal velocity. What is true about the forces acting on the skydiver at terminal velocity?
A satellite maintains a stable orbit around Earth. Which of the following statements accurately describes the forces involved?
A satellite maintains a stable orbit around Earth. Which of the following statements accurately describes the forces involved?
A spring is compressed. What type of force is stored within it?
A spring is compressed. What type of force is stored within it?
Why does an object in motion tend to stay in motion, according to the principle of inertia?
Why does an object in motion tend to stay in motion, according to the principle of inertia?
Which of the following is the correct SI unit for force?
Which of the following is the correct SI unit for force?
A feather and a bowling ball are dropped simultaneously in a vacuum. What will happen?
A feather and a bowling ball are dropped simultaneously in a vacuum. What will happen?
Which of the following scenarios involves a non-contact force?
Which of the following scenarios involves a non-contact force?
What effect does friction generally have on the motion of an object?
What effect does friction generally have on the motion of an object?
Which of the following forces is responsible for holding atoms together in a molecule?
Which of the following forces is responsible for holding atoms together in a molecule?
When an object experiences balanced forces, what is the net force acting on it?
When an object experiences balanced forces, what is the net force acting on it?
Consider a scenario where two identical cars are moving at the same speed. Car A is on a flat road, while Car B is on an upward sloping road. Which car experiences a greater net force?
Consider a scenario where two identical cars are moving at the same speed. Car A is on a flat road, while Car B is on an upward sloping road. Which car experiences a greater net force?
A box is being pushed across a floor at a constant speed. The applied force is 50 N. What is the magnitude of the frictional force acting on the box?
A box is being pushed across a floor at a constant speed. The applied force is 50 N. What is the magnitude of the frictional force acting on the box?
Explain how inertia is related to mass.
Explain how inertia is related to mass.
What type of force is primarily responsible for the tides on Earth?
What type of force is primarily responsible for the tides on Earth?
Flashcards
What is a force?
What is a force?
A push or pull on an object, capable of causing it to accelerate or deform.
Effects of force on objects?
Effects of force on objects?
Forces can cause an object at rest to move, change an object's speed, and change an object's direction.
What is inertia?
What is inertia?
The property of objects to resist changes in their state of motion; resistance to acceleration.
Contact forces
Contact forces
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Non-contact forces
Non-contact forces
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What is a Newton (N)?
What is a Newton (N)?
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Tension
Tension
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Friction
Friction
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Drag
Drag
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Upthrust
Upthrust
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Elastic Force
Elastic Force
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Gravitational Force
Gravitational Force
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Magnetic Force
Magnetic Force
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Electrostatic Force
Electrostatic Force
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Electromagnetic Force
Electromagnetic Force
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Nuclear Force
Nuclear Force
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Study Notes
- A force is a push or pull on an object.
Effects of Forces on Objects
- A force can cause an object at rest to move.
- A force can cause an object to speed up or slow down.
- A force can cause an object to change its direction.
Inertia
- Inertia is the property of objects to resist changes in its state of motion.
- An object at rest wants to remain at rest.
- An object in motion wants to remain in motion.
Types of Forces
- Forces are separated into contact forces and non-contact forces.
- Contact forces include thrust, tension, friction, drag, upthrust, and elastic force.
- Non-contact forces include gravitational force, magnetic force, electrostatic force, electromagnetic force, and nuclear force.
SI Unit for Force
- The SI unit for force is newtons, N.
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