English

Name the physical entity used for quantifying the motion of a body.

Advertisements
Advertisements

Question

Name the physical entity used for quantifying the motion of a body.

One Line Answer
Advertisements

Solution

Momentum is used for quantifying the motion of body.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Laws of Motion - Exercise 1 [Page 114]

APPEARS IN

Frank Physics [English] Class 9 ICSE
Chapter 3 Laws of Motion
Exercise 1 | Q 37 | Page 114

RELATED QUESTIONS

The rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end as shown in Figure. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2 m s–2. At what distance from the starting point does the box fall off the truck? (Ignore the size of the box).


A small block B is placed on another block A of mass 5 kg and length 20 cm. Initially, the block B is near the right end of block A (In the following Figure). A constant horizontal force of 10 N is applied to the block A. All the surfaces are assumed frictionless. Find the time that elapses before block B separates from A.


A man has fallen into a ditch of width d and two of his friends are slowly pulling him out using a light rope and two fixed pulleys as shown in the following figure. Show that the force (assumed equal for both the friends) exerted by each friend on the road increases as the man moves up. Find the force when the man is at a depth h.


A block is kept on the floor of an elevator at rest. The elevator starts descending with an acceleration of 12 m/s2. Find the displacement of the block during the first 0.2 s after the start. Take g = 10 m/s2.


Use Newton's second law of motion to explain the following instance : 

A cricketer pulls his hands back while catching a fast moving cricket ball .


Calculate the velocity of a body of mass 0.5 kg, when it has a linear momentum of 5 Ns.


A stone is dropped from a tower 98 m high. With what speed should a second stone be thrown 1 s later so that both hit the ground at the same time?


A body of mass 2 kg travels according to the law x(t) = pt + qt2 + rt3 where p = 3 ms−1, q = 4 ms−2 and r = 5 ms−3. The force acting on the body at t = 2 seconds is ______.


A woman throws an object of mass 500 g with a speed of 25 ms1.

  1. What is the impulse imparted to the object?
  2. If the object hits a wall and rebounds with half the original speed, what is the change in momentum of the object?

How does moving your hand backward while catching a cricket ball reduce pain?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×