NLN PAX Science| 148 QUESTIONS| WITH ALL ANSWERS CORRECT

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Cornea Correct Answer: The transparent front part of the eye that covers the iris, pupil, and anterior chamber. Mechanics Correct Answer: the study of the motion of objects Vectors Quantities ... Correct Answer: Both magnitude and direction Scalar Quantities Correct Answer: -Only magnitude -Length, area, volume, mass, density, energy, work, and power Motion Correct Answer: -An object's change in position relative to a reference point -Result of an unbalanced net force acting on the object Three basic quantities of motion Correct Answer: Displacement, velocity, and acceleration Displacement Correct Answer: -When something moves from one place to another -Along a straight line is a simple example of a vector quantity If an object travels from position x = -5 cm to x = 5 cm, it has undergone a displacement is _______ . Correct Answer: 10 cm A vector that spans the object's displacement in the direction of travel is known as a ____________________ . Correct Answer: Displacement Vector Projectile Motion Correct Answer: Occurs where an object thrown into the air near the earth's surface moves along an arched path under the effect of gravity alone Circular Motion Correct Answer: Movement of an object in a rotating circular path Periodic Motion Correct Answer: Motion that is repeated at recurring intervals, such as the swinging of a pendulum Two types of velocity Correct Answer: Average and instantaneous Average Velocity Correct Answer: -The total displacement divided by the time interval during which the displacement occurred -Vector and will always point in the same direction as the displacement vector (since time is a scalar and always positive) Average Velocity formula Correct Answer: total displacement/total time Instantaneous Velocity Correct Answer: An object in motion at a specific point in time Instantaneous Velocity formula Correct Answer: Acceleration Correct Answer: -The change in the velocity of an object -Vector quantity and will therefore have both magnitude and direction -Typically is not a constant value When an object is thrown upward the acceleration throughout its flight is ___ meters per second squared (m/s^2) downward. This is ___________ close to its surface. It is the acceleration of all objects when there is no resistance, such as that of _____ . Correct Answer: -9.8 -Earth's gravity (g) -Air Stationary Correct Answer: No work performed Object is held __________ , there is no work performed. This is because the formula for work performed is equal to the force times _________ , or __________________________ . Correct Answer: -Stationary -Distance -Displacement (W = F x d[cos0]) Displacement Correct Answer: -Is needed for work to be done -Vector measurement Newton's Laws of Motion Correct Answer: Three physical laws that, together, laid the foundation for classical mechanics Describe the relationship between a body and the forces acting upon it, and its motion in response to those forces Newton's First Law Correct Answer: 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. Inertia Correct Answer: The tendency of an object to resist a change in motion Newton's Second Law Correct Answer: -An objects acceleration is directly proportional to the net force acting on the object, and inversely proportional to the object's mass ( F = ma ) Newton's Third Law Correct Answer: -For every force, there is an equal and opposite force Newton's Third Law Equation Correct Answer: Fab = -Fba Weight Correct Answer: Object is [Show More]

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