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# a 2.0-kg ball moving eastward at 3.0 m/s suddenly collides with and sticks to a 4.0-kg ball moving northward at 2.0 m/s. what is the magnitude of the momentum of this system just after the collision?

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### James

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get a 2.0-kg ball moving eastward at 3.0 m/s suddenly collides with and sticks to a 4.0-kg ball moving northward at 2.0 m/s. what is the magnitude of the momentum of this system just after the collision? from EN Bilgi.

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Answer to Solved A 2.0-kg ball moving eastward at 3.0 m/s suddenly

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Answer to: A 2.0-kg ball moving eastward at 3.0 m/s suddenly collides with and sticks to a 4.0-kg ball moving northward at 2.0 m/s. Friction is negligible....

Momentum

## A 2.0-kg ball moving eastward at 3.0 m/s suddenly collides with and sticks to a 4.0-kg ball...

A 2.0-kg ball moving eastward at 3.0 m/s suddenly collides with and sticks to a 4.0-kg ball... Question:

A 2.0-kg ball moving eastward at 3.0 m/s suddenly collides with and sticks to a 4.0-kg ball moving northward at 2.0 m/s. Friction is negligible.

a) Determine the magnitude and direction of the momentum of this system just after the collision.

b) Determine

(i) the velocity of the system after the collision and

(ii) the percentage of initial kinetic energy lost in this collision?

## Conservation of Linear Momentum

Conservation of Linear momentum states that the momentum of objects before a collision is equal to the momentum of the objects after the collision:

m 1 U 1 + m 2 U 2 = m 1 V 1 + m 2 V 2 m1U1+m2U2=m1V1+m2V2 Where m 1 m1 is mass of object 1 m 2 m2 is mass of object 2 U 1 a n d U 2 U1 and U2

are initial velocities of object 1 and 2 respectively

V 1 a n d V 2 V1 and V2

are final velocities of object 1 and 2 after the collision

Momentum is a vector quantity, so its direction is the same as that of the velocity.

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We are given the following data:

∙ m 1 ∙m1

is mass of ball 1 = 2.0 kg

∙ m 2 ∙m2

is mass of ball 2 = 4.0 kg

{eq}\bullet...

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Linear Momentum, Impulse & Energy Conservation

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Chapter 49 / Lesson 1

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Different physics concepts can be used to explain collision. Understand the concepts of linear momentum, impulse, and energy conversation and relate them to collision.

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## Physics 2010, UVU

Study with Quizlet and memorize flashcards terms like Power, Fk, Angular Momentum and more.

## Physics 2010, UVU - Test 2

Power

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P=W/t, measured in Watts, 1 watt=1 J/s

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Fk

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UkN

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1/56 Created by sgoslin

### Terms in this set (56)

Power

P=W/t, measured in Watts, 1 watt=1 J/s

Fk UkN Angular Momentum L=r*mv Impulse force

Area under the force curve = F(avg)*deltaT

A very fast collision; In which a large amount of force is exerted in a small amount of time.

External force

Forces from agents outside the system

Kinetic energy 1/2mv² given in Joules (J)

Newton's 2nd Law F=ma

Newton's 3rd Law

For every action there is an equal and opposite reaction

Momentum

The quantity of motion that the object has

The Impulse-Momentum Theorem

If the duration of the momentum can be increased, the force of the impact will be decreased

Terminal speed

the speed at which the acceleration of a falling object is zero because friction balances the weight

Perfectly elastic collisions

Collision in which the energy of the system is conserved

All energy is conserved, no permanent deformation takes place. (Elastic illustrated by 2 pool balls colliding. Inelastic illustrated by a car crashing into a brick wall)

Elastic collisions

A collision in which no kinetic energy is lost; gas particles have same speed before and after the collision

inelastic collisions

A collision in which the two objects stick together and move with a common final velocity

mv is SHARED because colliding objects become connected (or entangled)

Conservation of energy

Energy cannot be created nor destroyed

Work

W=F*d (Force x displacement) the mechanical transfer of energy to or from a system by pushing or pulling on it.

Heat

the non-mechanical transfer of energy between a system and the environment due to a temperature difference between the two.

Isolated System

No energy is transferred into or out of a system

Work

Fd (Force * displacement)

Practice test, #1: A girl attaches a rock to a string, which she swings counter-clockwise in a horizontal circle. The string breaks at point P (bottom part of circle) . . . Which path will the rock follow?

It will continue along a horizontal path at the point where the rock breaks from the string (Path B)

Practice test, #2: A satellite is in orbit around the earth. Which feels the greater force, the satellite or the earth?

Earth and satellite feel exactly the same force (Newton's 3rd Law: every action has an equal and opposite reaction)

Practice test, #3 elevator suspended by a vertical cable moving downward, slowing down. Tension in the cable must be

greater than the weight of the elevator (accelerating in the opposite direction--up).

Practice test, #4: You push box G that is next to box H, causing both boxes to slide along the floor. The reaction force to your push is . . . (i.e., which force reacts to your push?)

the push of box G against you (Newton's 3rd Law: every action has an equal and opposite reaction)

Practice test, #5: A 20-ton truck collides with a 1500-lb car. Which statement is true (about the force of the truck and car)?

During the collision, the force on the truck is equal to the force on the car (Newton's 3rd Law: every action has an equal and opposite reaction)

Practice test, #6 object of mass M rests on flat table. Earth pulls on object with force of magnitude mg. What is reaction force to this pull?

Table pushing up on the object with force mg (Newton's 3rd Law)

Practice test, #7: A fireman is sliding down fire pole. As he speeds up, he tightens his grip on the pole (increases vertical frictional force). When force on his hands equals his weight, what happens to the fireman?

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James 15 day ago

Guys, does anyone know the answer?