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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (मराठी सेमी-इंग्रजी) इयत्ता ९ वी

Complete a sentence and explain it. When an object is in uniform circular motion, its ______ changes at every point.

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प्रश्न

Complete a sentence and explain it.

When an object is in uniform circular motion, its ______ changes at every point.

रिकाम्या जागा भरा
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उत्तर

When an object is in uniform circular motion, its velocity changes at every point.

Explanation:

In a uniform circular motion, the direction of motion of the body changes at every instant of time. This continuous change in the direction of motion of the body at every instant accounts for the change in its velocity at every point of instant.

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पाठ 1: Laws of Motion - Exercises [पृष्ठ १७]

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बालभारती Science and Technology [English] Standard 9 Maharashtra State
पाठ 1 Laws of Motion
Exercises | Q 4. c. | पृष्ठ १७

संबंधित प्रश्‍न

A particle starts from the origin at t = 0 s with a velocity of 10.0 `hatj "m/s"` and moves in the x-y plane with a constant acceleration of `(8.0 hati + 2.0 hatj) ms^(-2)`.

  1. At what time is the x-coordinate of the particle 16 m? What is the y-coordinate of the particle at that time?
  2. What is the speed of the particle at the time?

How does uniform circular motion differ from uniform linear motion?


Solve the following problem.

A particle moves in a circle with a constant speed of 15 m/s. The radius of the circle is 2 m. Determine the centripetal acceleration of the particle.


Solve the following problem.

A projectile is thrown at an angle of 30° to the horizontal. What should be the range of initial velocity (u) so that its range will be between 40m and 50 m? Assume g = 10 m s-2.


Which one of the following is most likely not a case of uniform circular motion?


Consider a simple pendulum of length 4 m. Its bob performs a circular motion in horizontal plane with its string making an angle 60° with the vertical. The Period of rotation of the bob is ____________.(Take g = 10 m/s2)


Select the WRONG statement.


At any instant, the magnitude of the centripetal force on a particle of mass 'm' performing circular motion is given by (ω = angular velocity and v = linear velocity of the particle) ______.


A string of length 'l' fixed at one end carries a mass 'm' at the other end. The string makes `3/pi` revolutions/second around the vertical axis through the fixed end as shown in figure. The tension 'T' in the string is ______.


Two particles P and Q are moving in concentric circles of rarui rp and rQ respectively. If their period of revolutions are in ratio 2 : 3, then ratio of their centripetal acceleration is ____________.


A stone of mass 3 kg attached at one end of a 2m long string is whirled in horizontal circle. The string makes an angle of 45° with the vertical then the centripetal force acting on the string is ______.

(g = 10 m/s2 , tan 45° = 1)


The angular speed of the minute hand of a clock in degrees per second is ______.


A body moves in a uniform circular motion ______.


A body is said to be in nonuniform motion if it travels ______.


It is possible to have objects moving with uniform velocity but non-uniform acceleration.


A wet open umbrella is held upright and is rotated about the handle at a uniform rate of 21 revolutions in 44 s. If the rim of the umbrella is a circle of 1 metre in diameter and the height of the rim above the floor is 1.5 m, the drops of water spun off the rim and hit the floor at a horizontal ______ m from the umbrella.


The kinetic energy K of a particle moving along a circle of radius R depends on the distance covered s as K = as2, where a is a constant. The force acting on the particle is ______.


The relationship between an object's linear velocity (v) and its angular velocity (ω) in a circular path of radius (r) is given by:


In uniform circular motion, although the speed is constant, why does acceleration occur?


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