हिंदी

'When a Hanging Carpet is Beaten with a Stick, the Dust Particles Start Coming Out of It'. this Phenomenon Can Be Best Explained by Making Use of :

Advertisements
Advertisements

प्रश्न

'When a hanging carpet is beaten with a stick, the dust particles start coming out of it'. This phenomenon can be best explained by making use of :

विकल्प

  • Newton's third law of motion

  • Newton's law of gravitation

  • Newton's first law of motion

  • Newton's second law of motion

MCQ
Advertisements

उत्तर

Newton’s first law of motion    
This is because beating the carpet with a stick  makes the carpet move to-and-fro quickly, but the dust particles tend to remain at rest due to their inertia and get separated from the carpet.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 2: Force and Laws of Motion - Very Short Answers 1 [पृष्ठ ५७]

APPEARS IN

लखमीर सिंग Physics (Science) [English] Class 9 ICSE
अध्याय 2 Force and Laws of Motion
Very Short Answers 1 | Q 45 | पृष्ठ ५७

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

A plumb bob is hung from the ceiling of a train compartment. If the train moves with an acceleration 'a' along a straight horizontal track , the string supporting the bob makes an angle tan−1 (a/g) with the normal to the ceiling. Suppose the train moves on an inclined straight track with uniform velocity. If the angle of incline is tan−1 (a/g), the string again makes the same angle with the normal to the ceiling. Can a person sitting inside the compartment tell by looking at the plumb line whether the train is accelerating on a horizontal straight track or moving on an incline? If yes, how? If not, then suggest a method to do so.


If you jump barefoot on a hard surface, your legs are injured. But they are not injured if you jump on a soft surface like sand or pillow. Why?


What do you mean by inertia of motion?


Name the different kinds of inertia an object can possess. Give an example of each.


Name the scientist who first stated the law of inertia.


A car of mass m starts from rest and acquires a velocity along east `v = vhati (v > 0)` in two seconds. Assuming the car moves with uniform acceleration, the force exerted on the car is ______.


A body of mass 10 kg is acted upon by two perpendicular forces, 6 N and 8 N. The resultant acceleration of the body is ______.

  1. 1 m s–2 at an angle of tan−1 `(4/3)` w.r.t 6 N force.
  2. 0.2 m s–2 at an angle of tan−1 `(4/3)` w.r.t 6 N force.
  3. 1 m s–2 at an angle of tan−1 `(3/4)` w.r.t 8 N force.
  4. 0.2 m s–2 at an angle of tan−1 `(3/4)` w.r.t 8 N force.

In a legend, the hero-kid kicked a toy pig so that it is projected with a speed greater than that of its cry. If the weight of the toy pig is assumed to be 5 kg and the time of contact 0.01 sec., the force with which the hero-kid kicked him was ______.

(Speed of cry = 330 m/s)


Two blocks A and B of masses m and 2 m, respectively, are held at rest such that the spring is in natural length. Find out the accelerations of both the blocks just after release.


An insect is at the bottom of a hemispherical ditch of radius 1 m. It crawls up the ditch but starts slipping after it is at height h from the bottom. If the coefficient of friction between the ground and the insect is 0.75, then h is ______. (g = 10 ms−2)


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×