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Which motion is exactly represented by Δs = vΔt? (1 mark)Īns. The particles shown in the graph have non-uniform motion which means that there is variable velocity in the moving particles. Yes both the graphs shown above represent the same type of motion. here represent the same type of motion or not. State whether the following two graphs in Fig. Motion of a body along a horizontal line in a definite direction is known as one-dimensional motion.Ī body in motion in a plane is known as a two-dimensional motion.Ī body in motion in space is known as a three-dimensional motion. Distinguish between one, two and three-dimensional motion. In the inertial frame of reference the body is always at rest. In which frame of reference is the body always at rest? (1 mark)Īns.
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(1 mark)Įxample: When two trains move in the same direction with similar velocity on two parallel tracks the moving train has relative velocity zero with respect to another train. Can a moving body have relative velocity zero with respect to another body? Give an example.Can a moving body have relative velocity zero with respect to another body? Give an example. Suppose a body decelerates at 8m/s2 and finally gets to rest after 10 sec. So, acceleration = (Final vel – Initial vel)/ time Suppose a body gains a velocity of 20m/s in 5 sec. What is the unit of acceleration? (1 mark) The total path is distance and the shortest path is displacement.Rotational, Linear, Translational, Oscillatory, Periodic, Simple Harmonic.The body is not moving concerning time is known as the state of rest.Change in position of the body with time.It carries a total of 4 to 6 periods and 12 to 14 marks.Motion is a part of CBSE class 11 unit 2, chapter 3 Motion in a straight line.Automobile vehicles commuting passengers from one stop to another.Daily activities such as walking, closing doors, running, etc.Derivation of these equations is a part of kinematics, but the major equations are mentioned below: The Third Law of Motion states that “To every action, there is an equal but opposite reaction.” Equations of MotionĬoming to the problem solving of motions sections, three equations of motions are widely used. Force is directly proportional to mass and acceleration. Second Law of Motion states that “Greater the mass of the body, greater will be the force required to accelerate it”. So the laws of motion are stated as:įirst Law of Motion states that “A body continues to be in the state of rest or of uniform motion unless an external force is applied to it”. They can be taken as the most basic building block of Physics. These laws of motion are building blocks of classical mechanics. Newton’s famous laws of motion cannot be neglected coming to the theory of motion. The vibration of a particle is the best example of Oscillatory motion. Oscillatory Motion: Oscillatory motion is the motion that repeats itself in the given time frame.Example: A ball is thrown in a cricket ground Projectile Motion: Projectile motion is motion when an object moves in both horizontal and vertical directions.The acting restoring force is directly proportional to the displacement of the object from the mean position. Simple Harmonic Motion: SHM is nothing but the motion of a body when a restoring torque is acting upon it in a direction opposite to its motion.Periodic Motion: Periodic motion is nothing but a motion that repeats itself.Linear Motion: Linear Motion is a special type of translational motion were moves in a path but in a single direction and single dimension.Example: A rope which tied stone at its end and is being moved Rotational Motion: Rotational motion can be understood as a body that is moving in a circular motion around a fixed axis.Translational Motion: Translational motion can be defined as motion where a body moves in a path in any of the three dimensions.Motion can be defined as different types. Itcan be explained in different forms such as: Motion can be fast or slow but every physical body goes through motion. Hence, motion can be taken as a relative quantity as it is considered with respect to the position of the observing body. Person A sitting inside the bus is at rest with respect to person B sitting inside the bus but person A is in motion concerning person C who is waiting for a bus at the bus stop. Similarly, take the example of a moving bus. Both are in high-speed motion concerning the audience but car A is at rest concerning car B and vice versa as both are running at the same speed. Let’s say one is car A and another is car B and they are running simultaneously in a race. You can easily understand motion with the examples of the cars in the race. Motion can be defined as a change in a body’s change in accordance with time.