Momentum, Impulse, Work, Energy & Power Flashcards

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1
Q

Linear Momentum

A

The product of mass and velocity of an object

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2
Q

Newton’s second law in terms of momentum

A

The net force
acting on an object is equal to the rate of change of momentum

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3
Q

law of conservation of linear momentum

A

The total linear
momentum of an isolated system remains constant (is conserved)

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4
Q

elastic collision

A

a collision in which both momentum
and kinetic energy are conserved
Ek before= Ek after

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5
Q

inelastic collision

A

a collision in which only momentum
is conserved
Ekbefore not = Ek after

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6
Q

impulse (J)

A

the product of the net force and the contact time (of an object)

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7
Q

work done on an object by a force

A

the product of the displacement and the component of the force parallel to the displacement

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8
Q

gravitational potential energy

A

the energy an object possesses due to its position relative to a reference point

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9
Q

kinetic energy

A

energy an object has as a result of the object’s motion

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10
Q

mechanical energy

A

the sum of gravitational potential and kinetic energy at a point

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11
Q

law of conservation of energy

A

the total energy in a system cannot be created nor destroyed; only transformed from one form to another

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12
Q

principle of conservation of mechanical energy

A

In the absence of air resistance or any external forces(Tension,Friction and Applied force), the mechanical energy of an object is constant

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13
Q

the work–energy theorem

A

work done by a net force on an object is equal to the change in the kinetic energy of the object

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14
Q

power

A

rate at which work is done

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15
Q

efficiency

A

the ratio of output power to input power

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16
Q

In a graph how can we get the greatest change in momentum if net force is acting upon it?

A

By using the difference between the two points on the y-axis of momentum

17
Q

collisions

A

conservation of linear momentum