50 Questions
What is the primary difference between mass and weight?
Mass is the amount of matter in an object, while weight is the force of gravity acting on the object
What is the acceleration of gravity on Earth?
9.8 m/sec2
What is the relationship between the mass of objects and the amount of gravity between them?
The amount of gravity is directly proportional to the mass of the objects
What is the force that increases the velocity of falling objects?
Gravity
What is the formula to calculate the weight of an object?
W = mg
What is the direction of the normal force?
Perpendicular to the surface and opposite to the direction of gravity
What is the relationship between the masses of two objects and their acceleration due to gravity?
All objects accelerate at the same rate regardless of mass
What is the force that resists the relative motion of two materials against each other?
Friction
What is the concept of Newton's third law of motion?
For every action force, there is an equal and opposite reaction force
What is the difference between action and reaction forces?
Action forces are equal to reaction forces
What is the primary factor that determines the amount of friction between two surfaces?
Type of materials involved
What type of friction occurs when objects are moving?
Kinetic friction
What is the force exerted on an object by a surface, always directed perpendicular to the surface?
Normal force
What determines whether an object floats or sinks in a fluid?
Density of the object
What is the concept that relates the momentum of an object to its mass and velocity?
p = mv
What is the result of the application of a force to an object over a period of time?
Change in momentum
What is the law that states that the total momentum of a system before and after a collision is the same?
Conservation of momentum
What is the term for the ability of an object to float in a fluid?
Buoyancy
What is the fundamental principle of conservation of momentum?
Momentum is neither created nor destroyed; it only moves from one place to another.
What is the unit of work?
Joules (J)
What is the condition for work to be positive?
The force and displacement are in the same direction.
What is the purpose of drawing a free body diagram?
To know the direction of each vector and assess the angle between the vectors.
How is work done by a non-linear force typically calculated?
By using calculus and integrating the function.
What is energy defined as in physics?
The ability to do work or cause change.
What are the two main types of energy?
Kinetic and potential energy.
What is the law of conservation of energy?
Energy is neither created nor destroyed; it is transformed from one form to another.
What is an example of kinetic energy?
A ball falling mid-air.
What is potential energy?
Energy stored as elasticity, charge, chemical bonds, or position.
What is the fundamental concept of Newton's third law?
For every action, there is an equal and opposite reaction.
What is the result of the interaction between two objects?
Both objects experience two forces that are equal in magnitude and opposite in direction.
What is the relationship between the size of the objects and the forces they experience?
The forces are always equal and opposite, regardless of the size of the objects.
What is the applicability of Newton's third law?
Both on Earth and in space.
Why does the shopping cart move when you push it?
Because the force applied to the cart is greater than the force it exerts back.
What is the relationship between force and mass according to Newton's 2nd Law?
F = ma
What is the necessary condition for work to be done on an object?
A force must act on the object over a given distance
What is the relationship between the work done on an object and its change in kinetic energy?
The work done is equal to the change in kinetic energy
What happens to the kinetic energy of an object when it is slowed or stopped?
It decreases
What is the fundamental concept of science that explains the transformation of energy from one form to another?
The Law of Conservation of Energy
What is the result of the interaction between an object and a surface when the object is pushed?
Work is done on the object
What is the purpose of the work-energy theorem?
To relate the work done on an object to its change in kinetic energy
What is the applicability of the Law of Conservation of Energy?
In several branches of physics and engineering
What is the consequence of the Law of Conservation of Energy?
Energy is transformed from one form to another
What is the relationship between the work done on an object and its change in energy?
The work done is equal to the change in energy
What is the fundamental principle of the First Law of Thermodynamics?
Energy can be changed from one form to another
What is the primary difference between the First Law and the Second Law of Thermodynamics?
The First Law deals with energy conversion, while the Second Law deals with entropy
What is the purpose of a pulley system?
To change the direction of the force and/or increase the magnitude of the force being applied
What is the primary characteristic of a system in thermodynamics?
It is isolated from external forces
What happens to the energy in a system when outside forces such as friction act on it?
The energy is transferred to another object within the larger system
What is the relationship between kinetic energy and potential energy in a system?
The sum of kinetic and potential energy is always constant
What is the primary application of the Law of Conservation of Energy?
In the analysis of all forms of energy
Test your knowledge of Newton's third law, which states that every action has an equal and opposite reaction. Learn how forces interact between objects and how this law applies to objects on Earth and in space.
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