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What is the SI unit of impulse?
What is the SI unit of impulse?
Impulse is equal to the force applied multiplied by the mass of the object.
Impulse is equal to the force applied multiplied by the mass of the object.
False
Define an isolated system.
Define an isolated system.
A system with no exchange of mass and energy between it and its surroundings.
The law of conservation of linear momentum states that in the absence of __________, the total linear momentum of an isolated system remains constant.
The law of conservation of linear momentum states that in the absence of __________, the total linear momentum of an isolated system remains constant.
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Match the following terms with their definitions:
Match the following terms with their definitions:
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According to Newton's Second Law, how is the external force related to the change in momentum?
According to Newton's Second Law, how is the external force related to the change in momentum?
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The impulse experienced by an object is directly proportional to the change in momentum of that object.
The impulse experienced by an object is directly proportional to the change in momentum of that object.
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What happens to the total momentum of a system when an external force acts on it?
What happens to the total momentum of a system when an external force acts on it?
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What is kinetic friction?
What is kinetic friction?
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Kinetic friction is dependent on the area of contact between two surfaces.
Kinetic friction is dependent on the area of contact between two surfaces.
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What is the formula for kinetic friction?
What is the formula for kinetic friction?
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Which of the following statements is true regarding coplanar concurrent forces?
Which of the following statements is true regarding coplanar concurrent forces?
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The sum of the resolved components of all forces in a given direction must be equal to zero for equilibrium.
The sum of the resolved components of all forces in a given direction must be equal to zero for equilibrium.
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The constant μk is known as the coefficient of ______.
The constant μk is known as the coefficient of ______.
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What is Lami’s theorem?
What is Lami’s theorem?
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Which of the following is an advantage of friction?
Which of the following is an advantage of friction?
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Static friction acts between surfaces in contact before one body starts to ______ on the surface of another.
Static friction acts between surfaces in contact before one body starts to ______ on the surface of another.
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Friction is always a disadvantage in mechanical applications.
Friction is always a disadvantage in mechanical applications.
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Match the following types of friction with their descriptions:
Match the following types of friction with their descriptions:
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Which statement describes limiting friction?
Which statement describes limiting friction?
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Name one disadvantage of friction.
Name one disadvantage of friction.
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Match the types of friction with their descriptions:
Match the types of friction with their descriptions:
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What must happen to the resultant force when a point is in equilibrium?
What must happen to the resultant force when a point is in equilibrium?
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In order for the point O to be in equilibrium, the vector sum of forces P, Q, and R must equal ______.
In order for the point O to be in equilibrium, the vector sum of forces P, Q, and R must equal ______.
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What does Newton's First Law of Motion state?
What does Newton's First Law of Motion state?
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Inertia is the property of a body that resists changes to its state of motion.
Inertia is the property of a body that resists changes to its state of motion.
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What is the formula for momentum?
What is the formula for momentum?
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The unit of force in the SI system is called __________.
The unit of force in the SI system is called __________.
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Match the type of force with its definition:
Match the type of force with its definition:
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What is the SI unit of momentum?
What is the SI unit of momentum?
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According to Newton's Third Law of Motion, action and reaction forces act on the same body.
According to Newton's Third Law of Motion, action and reaction forces act on the same body.
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What is the relationship between force, mass, and acceleration?
What is the relationship between force, mass, and acceleration?
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What provides the centripetal force for a car moving on a circular road?
What provides the centripetal force for a car moving on a circular road?
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The centrifugal reaction force cancels out the centripetal force acting on the car.
The centrifugal reaction force cancels out the centripetal force acting on the car.
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What is the formula for calculating the maximum speed limit of a car for safe turning on a banked road?
What is the formula for calculating the maximum speed limit of a car for safe turning on a banked road?
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Centripetal force is required to keep an object moving in a __________ path.
Centripetal force is required to keep an object moving in a __________ path.
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Which of the following statements is true regarding the forces acting on a car on a circular road?
Which of the following statements is true regarding the forces acting on a car on a circular road?
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Banking of roads is intended to reduce reliance on friction for providing centripetal force.
Banking of roads is intended to reduce reliance on friction for providing centripetal force.
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If the speed of the car exceeds the limit determined by __________, it will skid off the road.
If the speed of the car exceeds the limit determined by __________, it will skid off the road.
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According to Newton’s Third Law, what is the relationship between action and reaction forces?
According to Newton’s Third Law, what is the relationship between action and reaction forces?
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The recoil velocity of the gun is the same as the muzzle velocity of the bullet.
The recoil velocity of the gun is the same as the muzzle velocity of the bullet.
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What happens to the total momentum of a system when there are no external forces acting on it?
What happens to the total momentum of a system when there are no external forces acting on it?
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The movement of the gun backwards after firing is called __________.
The movement of the gun backwards after firing is called __________.
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What is the formula for the recoil velocity of the gun after firing?
What is the formula for the recoil velocity of the gun after firing?
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The equation $m_2v_2 - m_2u_2 = -m_1v_1 + m_1u_1$ represents the forces between two colliding bodies.
The equation $m_2v_2 - m_2u_2 = -m_1v_1 + m_1u_1$ represents the forces between two colliding bodies.
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If a bullet of mass 0.01 kg has a muzzle velocity of 400 m/s, what is the recoil velocity of a gun of mass 5 kg?
If a bullet of mass 0.01 kg has a muzzle velocity of 400 m/s, what is the recoil velocity of a gun of mass 5 kg?
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Study Notes
Laws of Motion
- Force: An external push or pull that changes or attempts to change the position of a body at rest or in uniform motion.
- Inertia: A body's resistance to change in its state of rest or uniform motion. Inertia is directly proportional to mass. A greater mass means a greater inertia.
- Newton's First Law: A body at rest stays at rest, and a body in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
- Momentum: The product of mass and velocity. Momentum is a vector quantity, meaning it has both magnitude and direction. Momentum's direction is the same as the direction of velocity. Formula: p = mv (momentum = mass × velocity)
- Newton's Second Law: The rate of change of momentum of an object is directly proportional to the net force acting on it and is in the same direction. The formula is F = ma (force = mass × acceleration).
- Impulse: The product of force and the time during which the force acts. Impulse is a vector quantity. Formula: I = F × t (impulse = force × time)
- Isolated System: A system where there is no exchange of mass or energy with its surroundings.
- Law of Conservation of Linear Momentum: In the absence of external forces, the total linear momentum of an isolated system remains constant.
Friction
- Types of Friction: Static friction (opposes motion before movement), Limiting friction (maximum static friction), Kinetic friction (opposes movement during motion).
- Laws of Limiting Friction: The magnitude of limiting static friction is independent of the contact area as long as the normal reaction remains the same. It is directly proportional to the normal reaction. Formula: fs = µsR (limiting friction = coefficient of static friction × normal reaction)
- Laws of Kinetic Friction: The magnitude of kinetic friction is constant and depends on the nature of the two surfaces in contact, independent of contact area. It's directly proportional to the normal reaction. Formula: fk = µkR (kinetic friction = coefficient of kinetic friction × normal reaction).
Concurrent Forces
- Concurrent Forces: Forces acting at the same point on a body.
- Coplanar Concurrent Forces: Forces acting in the same plane.
- Equilibrium of Concurrent Forces: Three forces in equilibrium can be represented by the sides of a triangle taken in order.
- Lami's Theorem: A useful relationship among three concurrent, coplanar forces in equilibrium.
Centripetal Force
- Centripetal force: the force that keeps a body moving in a circular path. Formula: F = mv²/r (force = mass x velocity² / radius).
- Centrifugal Reaction: the reaction to the centripetal force.
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Description
Test your knowledge on the fundamental Laws of Motion as described by Sir Isaac Newton. This quiz covers concepts such as force, inertia, momentum, and the mathematical relationships governing these principles. Challenge yourself and see how well you understand the laws that govern motion and force.