Advertisements
Advertisements
Question
What do you understand by the term momentum?
Solution
The instantaneous force which body possesses due to the combined effect of mass and velocity is called momentum of the body. Mathematically, momentum is the product of mass and velocity.
P = mv
where P represents the momentum of the body.
APPEARS IN
RELATED QUESTIONS
An aircraft executes a horizontal loop at a speed of 720 km/h with its wings banked at 15°. What is the radius of the loop?
An object is placed far away from all the objects that can exert force on it. A frame of reference is constructed by taking the origin and axes fixed in this object. Will the frame be necessarily inertial?
When a horse pulls a cart, the force that helps the horse to move forward is the force exerted by
The force of buoyancy exerted by the atmosphere on a balloon is B in the upward direction and remains constant. The force of air resistance on the balloon acts opposite the direction of velocity and is proportional to it. The balloon carries a mass M and is found to fall to the earth's surface with a constant velocity v. How much mass should be removed from the balloon so that it may rise with a constant velocity v?
Show that the rate of change of momentum = mass × acceleration. Under what condition does this relation hold?
Two balls A and B of masses m and 2 m are in motion with velocities 2v and v, respectively. Compare:
(i) Their inertia.
(ii) Their momentum.
(iii) The force needed to stop them in the same time.
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.
Name the physical entity used for quantifying the motion of a body.
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?
- The force at t = (1/8) s on the particle is – 16π2 Am.
- The particle is acted upon by on impulse of magnitude 4π2 A m at t = 0 s and t = (1/4) s.
- The particle is not acted upon by any force.
- The particle is not acted upon by a constant force.
- There is no impulse acting on the particle.
