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What are vector quantities? Give two examples.
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Vector quantities have both magnitude and direction. Examples include displacement and velocity.
What are scalar quantities? Give two examples.
Scalar quantities have only magnitude and no direction. Examples include distance and speed.
What is the formula for calculating speed, and what are its common units?
The formula for speed is Speed = Distance / Time. Common units include cm/s (CGS), m/s (SI), and km/h.
How is uniform motion different from non-uniform motion?
Uniform motion involves equal distances covered in equal intervals of time, whereas non-uniform motion involves unequal distances covered in either equal intervals or unequal distances in equal time intervals.
Write the three equations of motion used in linear motion analysis.
The three equations of motion are: 1) v = u + at, 2) s = ut + ½at², 3) 2as = v² - u².
Explain the difference between distance and displacement.
Distance is the actual length of the path covered, regardless of direction, while displacement is the shortest distance between the initial and final points in a specific direction.
When can we say an object is undergoing uniform acceleration?
An object is undergoing uniform acceleration when it experiences equal changes in velocity in equal intervals of time, such as a freely falling object.
What distinguishes velocity from speed?
Velocity is speed with a definite direction, whereas speed is the rate at which an object covers distance with no regard to direction.
How do you calculate acceleration, and what are its units?
Acceleration is calculated using the formula: Acceleration = (Final Velocity - Initial Velocity) / Time. Its units are cm/s² in the CGS system and m/s² in the SI system.
Define motion in the context of physics.
Motion is defined as the change in position of an object with respect to its surroundings and over time.
How can graphical representation aid in understanding motion?
Graphical representations, such as distance-time and velocity-time graphs, provide a visual method to understand and analyze motion, making it easier to see relationships and changes in motion over time.
What is the formula for velocity in uniform circular motion and what do the variables represent?
The formula for velocity in uniform circular motion is v = 2πr/t, where r is the radius of the circular path and t is the time period for one complete revolution.
Define and provide an example of negative acceleration (retardation).
Negative acceleration, or retardation, is the decrease in velocity over time. An example is a bus coming to a halt.
Give an example of one-dimensional motion.
An example of one-dimensional motion is a car moving along a straight path.
Describe uniform circular motion and provide an example.
Uniform circular motion occurs when an object travels in a circular path with a constant speed. An example is an athlete running on a circular track.
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