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Acar runs at a uniform rate on a circular track of radius 100m taking 62.8 s on each lap. What is the average velocity and average speed of car for one complete lap?
(b) Radius of circular track R = 100 m and time taken by car to complete one lap of circular track t = 62.8 s. Total displacement of car on covering a lap = 0 ∴ Average velocity of car = total displacement/total time = 0/62.8 s = 0 Total distance covered by the car in one lap s = 2πR = 2 × 3.14 × 10Read more
(b) Radius of circular track R = 100 m and time taken by car to complete one lap of circular track t = 62.8 s.
Total displacement of car on covering a lap = 0
∴ Average velocity of car = total displacement/total time = 0/62.8 s = 0
Total distance covered by the car in one lap s = 2πR = 2 × 3.14 × 100 = 628 m
∴ Average speed of car = total distance/total time = s/t = 628 m/62.8 s = 10m s⁻¹ .
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-7/
See lessA body exerts a force F on a surface of surface area A. Pressure P acting on the surface is
(a) The correct relation is P = F/A because pressure is defined as the force acting normally on a unit A surface area. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-9/
(a) The correct relation is P = F/A because pressure is defined as the force acting normally on a unit A surface area.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-9/
See lessThe value of quantity G in the law of gravitation
(d) is independent of mass and radius of earth. G is a universal constant having a value of 6.673 x 10⁻¹¹ N m² kg⁻². https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-9/
(d) is independent of mass and radius of earth. G is a universal constant having a value of 6.673 x 10⁻¹¹ N m² kg⁻².
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-9/
See lessIn a pictograph, what does each symbol represent?
In a pictograph, each symbol represents a scale or quantity. Pictographs represent data by means of symbols in which each symbol represents a particular amount or value, which quickly conveys information. Click here for more: https://www.tiwariacademy.com/ncert-solutions/class-6/maths/
In a pictograph, each symbol represents a scale or quantity. Pictographs represent data by means of symbols in which each symbol represents a particular amount or value, which quickly conveys information.
Click here for more:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-6/maths/
Work is done on a body when
(d) Work is said to be done on a body when a force acts on the body and under its influence the body is displaced through some distance along the direction of force. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-10/
(d) Work is said to be done on a body when a force acts on the body and under its influence the body is displaced through some distance along the direction of force.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-10/
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