1. Define:- (i) Speed
(ii)Velocity
(iii) Displacement
(iv) Time
(v) Acceleration
Answers
Answer:
Displacement : Displacement is a vector quantity that refers to the shortest distance between the two positions of the object i.e, the difference between the final and initial positions of the object, in a given time. Its d irection is from initial to final position of the object. It is represented by the vector drawn from the initial position to its final position.
Acceleration: Generally, the velocity of a moving object changes with time. Sometimes the magnitude of velocity increases and sometimes it decreases. Sometimes the magnitude remains constant but the direction changes as in circular motion. The rate of change in velocity is defined as acceleration. Therefore, “The rate of change of velocity of an object with respect to time is known as acceleration.”
speed: speed of something is the rate at which it moves or travels. speed is defined as the rate of movement of a body expressed either as the distance travelled divided by the time taken or the rate of change of position with respect to time at a particular point. it is a scalar quantity that refers to “how fast an object is the moving.” “the time rate of distance is called speed. speed = distance time distance time the unit of speed is m/s. the dimensional formula of speed is [m0lt-¹]
Velocity:It is the vector quantity that refers to “the rate at which an object changes its position.” Imagine a person moving rapidly one step forward and one step back-always returning to the original starting position. While this might result in a frenzy of activity. It would result in a zero velocity. Because the person always returns to the original position. The time rate of displacement is called velocity velocity = displacement time.
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Answer:
(I) distance per unit time is known as speed
(ii) velocity is the speed of an object moving in a definite direction
(iii)displacement is defined to be the change in position of an object
(iv) time is the dimension on which the evolution state of system is allowed to occur
(v) it is the measure of the change in the velocity of an object per unit time
Explanation:
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