मराठी

What do you mean by an impulsive force?

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प्रश्न

What do you mean by an impulsive force?

एका वाक्यात उत्तर
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उत्तर

The force that acts on a body for a very short time but produces a large change in its momentum, is known as impulsive force.

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पाठ 3: Laws of Motion - Exercise 3 [पृष्ठ १३०]

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फ्रँक Physics Part 1 [English] Class 9 ICSE
पाठ 3 Laws of Motion
Exercise 3 | Q 50 | पृष्ठ १३०

संबंधित प्रश्‍न

A body of mass 0.40 kg moving initially with a constant speed of 10 m s–1 to the north is subject to a constant force of 8.0 N directed towards the south for 30 s. Take the instant the force is applied to be t = 0, the position of the body at that time to be x = 0, and predict its position at t = –5 s, 25 s, 100 s.


Two blocks A and B of mass mA and mB , respectively, are kept in contact on a frictionless table. The experimenter pushes block A from behind, so that the blocks accelerate. If block A exerts force F on block B, what is the force exerted by the experimenter on block A?


A person is standing on a weighing machine placed on the floor of an elevator. The elevator starts going up with some acceleration, moves with uniform velocity for a while and finally decelerates to stop. The maximum and the minimum weights recorded are 72 kg and 60 kg, respectively. Assuming that the magnitudes of acceleration and deceleration are the same, find (a) the true weight of the person and (b) the magnitude of the acceleration. Take g = 9.9 m/s2.


Consider the Atwood machine of the previous problem. The larger mass is stopped for a moment, 2.0 s after the system is set into motion. Find the time that elapses before the string is tight again.


Define Newton’s second law of motion.


Prove mathematically F = ma


What causes motion in a body?


Why is it advantageous to turn before taking a long jump?


The motion of a particle of mass m is given by x = 0 for t < 0 s, x(t) = A sin 4 pt for 0 < t < (1/4) s (A > o), and x = 0 for t > (1/4) s. Which of the following statements is true?

  1. The force at t = (1/8) s on the particle is – 16π2 Am.
  2. The particle is acted upon by on impulse of magnitude 4π2 A m at t = 0 s and t = (1/4) s.
  3. The particle is not acted upon by any force.
  4. The particle is not acted upon by a constant force.
  5. There is no impulse acting on the particle.

Why is catching a slow-moving ball easier than catching a fast-moving ball?


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