Impulse of a Force

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Impulse of a Force: Overview

This Topic covers sub-topics such as Linear Impulse, Linear Impulse from F-T Diagrams, Linear Impulse of Time Varying Force and, Linear Impulse of Constant Force

Important Questions on Impulse of a Force

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A bullet of 10 g leaves the barrel of gun with a velocity of 600 m s-1. If the barrel of gun is 50 cm long and mass of gun is 3 kg, then value of impulse supplied to the gun will be:

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A ball of mass 0.5 kg dropped from a height of 20 m strikes a horizontal floor and rebounds to a height of 5 m. Find the impulse exerted by the floor on the ball during impact.

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A particle of mass m strikes a wall with speed v at an angle 30° with the wall elastically as shown in the figure. Calculate the impulse imparted to the ball by the wall.

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What is the impulse of force shown in the figure?

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A force F(t)=(12-3t) N varying with time acts on a particle moving along x-axis. Starting from v=0 particle is taken along x-axis. Find the momentum of particle at t=10 s.

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20 g ball thrown with a velocity of 4 m s-1 the left after a collision with the wall the ball is reflected with a velocity of 2 m s-1 to the right. Determine the impulse

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A time varying force acts on a ball of mass 100 g for 2 ms. The force versus time curve is shown below. If the initial speed of the ball is 10 m s-1, then the speed of ball after 2 ms is

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A smooth sphere of mass 0.5 kg moving with a horizontal speed 3m s-1 strikes at right angle a vertical wall and bounces off the wall with a horizontal speed 2 ms-1.The coefficient of restitution between the sphere and the wall and the impulses exerted on the wall at impact?

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A bullet moving with a velocity of 400 m s-1 was brought to rest in 0.01 s by applying a force of 2000 N. Find this impulse and the mass of the bullet.

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A rubber ball of mass 0.05 kg falls from a height of 1 m and rebounds to a height of 0.5 m.  Find the impulse and the average force between the ball and the ground if the time during which they were in contact was 0.1 s .

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A 50 kg skater is standing still in front of a wall.  By pushing the wall he propels himself backwards with a velocity of 1.2 m s-1. If his hands were in contact with the wall for 0.7 s, find the impulse and impulsive force ? 

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The mass of a volleyball is 0.35 kg. In a match, the ball is spiked so that its incoming velocity of 2 m/s  is changed to an outgoing velocity of 22 m/s. What impulse does the player apply to the ball·?

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What is the average force needed to stop a hammer with 25 N s momentum in 0.05 s.

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A cricket ball weighing 200 g moving horizontally at 30 m s-1 is hit straight back with a velocity of 20 m s-1. Find the impulse. If the time of contact of the ball and the bat is 120 s.  What is the impulsive force applied by the bat ? 

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A tennis ball of mass 100 g strikes a bat held vertically at an angle 45 to the normal, with a velocity of 10 m s-1  and gets deflected. Calculate the impulse on the bat. 

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A cricket ball of mass 100 g moving with a velocity of 200 m s-1, is brought to rest by a player in 0.1 s. Find the impulse imparted by the ball.

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A cricket ball of mass 100 g moving with a velocity of 200 m s-1, is brought to rest by a player in 0.1 s. Find the average force applied by the player.

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Why are shock absorbers used in scooter and cars ? 

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What is an impulsive force?

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Do you think that a large force always produce a larger impulse on a body than a small force ? Explain.