1. Periodic motion is repetitive in nature. Explain giving two examples. 2. Differentiate between circular and rotational motion with examples 3. What is the similarity and difference between the motion of a spinning top and a boy moving to and fro of a swing? Explain in detail 4. Explain SI Unit. Mention the SI Unit of Length, mass , time with symbol and unit 5. 1.65 m=--------mm 5km=------------m 30m=-------dam 2 hm=---------m Please answer this fast it is urgent
Answers
Answer:
Explanation:
Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave.
Rotation is always when a body moves on its own axis . Circular when the body moves around some other body. Rotatory motion is when a body spins around its centre of gravity or its own axis. Circular motion is due to centripetal force, while rotatory motion involves torque
Spinning top that moves around in an axis and also as a whole thus it contains two types of motion namely rotational and circular motion. Boy moving to and from a swing moves similar to swinging pendulum which is periodic
The units and their physical quantities are the second for time, the metre for measurement of length, the kilogram for mass, the ampere for electric current, the kelvin for temperature, the mole for amount of substance, and the candela for luminous intensity.
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SI base unit.
Symbol Name Base quantity
cd candela luminous intensity
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Answer:
(iv) Periodic motion : (a) Pendulum of clock, (b) Motion of a swing, heartbeat;
Rotation is always when a body moves on its own axis . Circular when the body moves around some other body. Rotatory motion is when a body spins around its centre of gravity or its own axis. Circular motion is due to centripetal force, while rotatory motion involves torque
Spinning top that moves around in an axis and also as a whole thus it contains two types of motion namely rotational and circular motion. Boy moving to and from a swing moves similar to swinging pendulum which is periodic motion.