Across
- 2. Law-Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
- 5. power is the rate of doing work, the amount of energy transferred per unit time. Having no direction, it is a scalar quantity.
- 6. most common definition of weight found in introductory physics textbooks defines weight as the force exerted on a body by gravity. This is often expressed in the formula W = mg, where W is the weight, m the mass of the object, and g gravitational acceleration.
- 7. branch of mechanics concerned with the motion of bodies under the action of forces.
- 11. Energy-The energy the Earth receives from the sun, primarily as visible light and other forms of electromagnetic radiation.
- 16. constant of proportionality serves as a multiplier.
- 19. the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface
- 21. or operating, or designed to do so, only at a low speed; not quick or fast.
- 22. Velocity-The vector quantity velocity is the change in speed with respect to time. The kinematic equations describe the motion of object in terms of constant velocity or a constant acceleration. ... The initial velocity is the velocity at the starting point while the final velocity is the velocity at the final point of time.
- 24. SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one meter per second per second, and is equivalent to 100,000 dynes.
- 25. branch of science concerned with the nature and properties of matter and energy. The subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms.
- 26. Velocity-The average speed of an object is defined as the distance traveled divided by the time elapsed. Velocity is a vector quantity, and average velocity can be defined as the displacement divided by the time.
- 27. SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one meter per second per second, and is equivalent to 100,000 dynes.
- 29. Energy-the kinetic energy of an object is the energy that it possesses due to its motion.
- 30. Energy-Heat is a form of energy that can be transferred from one object to another or even created at the expense of the loss of other forms of energy. To review, temperature is a measure of the ability of a substance, or more generally of any physical system, to transfer heat energy to another physical system.
- 32. in physics, is the rate of change of velocity of an object with respect to time.
- 33. in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms.
- 35. Machine-A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force. ... Lever. Wheel and axle. Pulley.
- 36. being a scalar quantity, is the rate at which an object covers distance.
- 37. in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.
- 39. in physics is defined by its measurement: time is what a clock reads.
- 41. is a scalar quantity that refers to "how much ground an object has covered" during its motion.
- 42. is a physics term; it refers to the quantity of motion that an object has. A sports team that is on the move has the momentum. If an object is in motion (on the move) then it has momentum. Momentum can be defined as "mass in motion." ... Momentum depends upon the variables mass and velocity.
- 44. Energy-The energy released by the nucleus of an atom as the result of nuclear fission, nuclear fusion, or radioactive decay.
- 45. or operating, or designed to do so, only at a low speed; not quick or fast.
- 47. Velocity- The initial velocity,vi is the velocity of the object before acceleration causes a change.
Down
- 1. unit of length that is one of the seven base SI units and is defined as the length of the path traveled by light in a vacuum during a time interval of 1/299792458 of a second
- 3. branch of physics that deals with the motion of material objects. The term mechanics generally refers to the motion of large objects, whereas the study of motion at the level of the atom or smaller is the domain of quantum mechanics.
- 4. size, length, or amount of something, as established by measuring.
- 8. joule is equal to the energy used to accelerate a body with a mass of one kilogram using one newton of force over a distance of one meter. One joule is also equivalent to one watt-second.
- 9. in physics, a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity's magnitude.
- 10. Energy- potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.
- 12. above version of Newton's Second Law can be rearranged to define the impulse, J, delivered by a constant force, F. Impulse is a vector quantity defined as the product of the force acting on a body and the time interval during which the force is exerted. ... The unit of impulse is the same as the unit of momentum, kg.
- 13. physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate.
- 14. involve forces (there is a change in velocity). ... Specifically, collisions can either be elastic, meaning they conserve both momentum and kinetic energy, or inelastic, meaning they conserve momentum but not kinetic energy.
- 15. Motion- periodic motion of the particles of an elastic body or medium in alternately opposite directions from the position of equilibrium when that equilibrium has been disturbed (as when a stretched cord produces musical tones or molecules in the air transmit sounds to the ear)
- 17. Motion translational motion. Angular Position (θ): This is the angular location of the reference line which rotates with the object relative to a fixed axis.-
- 18. is a physical vector quantity; both magnitude and direction are needed to define it.
- 20. refers to Einstein's theory that time and space are not absolute. ... In physics, relativity is about how even time and space aren't absolute, objective facts.
- 23. is defined as force per unit area. It is usually more convenient to use pressure rather than force to describe the influences upon fluid behavior. The standard unit for pressure is the Pascal, which is a Newton per square meter.
- 28. is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
- 31. Energy-Thermal energy is the internal energy of an object due to the kinetic energy of its atoms and/or molecules. The atoms and/or molecules of a hotter object have greater kinetic energy than those of a colder one, in the form of vibrational, rotational, or, in the case of a gas, translational motion.
- 34. watt is the unit of measure for calculating the power of a circuit. A single watt (W) is equivalent to one joule (J) per second (S), where a joule is a measurement of the energy.
- 38. Motion-A rotation is a circular movement of an object around a center (or point) of rotation . A three-dimensional object always rotates around an imaginary line called a rotation axis. If the axis passes through the body's center of mass, the body is said to rotate upon itself, or spin.
- 39. Law-These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects.
- 40. Friction is a catchall word that refers to any force that resists relative tangential motion (or intended motion). "Relative tangential motion" is a fancy way to say "slipping" or "sliding". Its direction is opposite the relative velocity (or intended velocity).
- 43. kinetic energy of an object is the energy that it possesses due to its motion.
- 46. law-Newton's first law of motion is often stated as. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.