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EXCI 351 > LINEAR KINETIC > Flashcards

LINEAR KINETIC Flashcards

1
Q

What is linear kinetic

A

the study of the forces that inhibit, cause, facilitate, or modify the motion of a body.

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2
Q

what is the 1st law of newton

A

if no external force on an object = object will not move or continue to move at constant speed in a straight line)

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3
Q

what is static equilibrium

A

the sum of all external force =0

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4
Q

what is 2nd newton laws

A

that if a net external force is exerted on an object, the object will accelerate in the direction of the net external force, and its acceleration will be directly proportional to the net external force and inversely proportional to its mass.

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5
Q

what happen if a larger force is applied to an object of an equal mass

A

the acceleration of that object will be greater

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6
Q

what happen if the same amount of force is applied to an object of a greater mass

A

the acceleration will be less

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7
Q

what is newton 3rd law

A

that if an object exerts a force on another object, the other object exerts the same force on the first object but in the opposite direction

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8
Q

t/f force exist in mirrored pairs

A

true

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9
Q

t/f force can produce unequal reaction

A

t

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10
Q

what is newton universal gravitational law

A

All objects attract each other with a gravitational force that is inversely proportional to the square of the distance between the objects

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11
Q

the force of gravity is proportional to what

A

the mass of each of the two bodies being attracted to each other.

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12
Q

all factor of the law of universal gravitation are constants excepts

A

the mass of the object interacting with the earth

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13
Q

what is linear momentum

A

the product of an object’s mass and its linear velocity

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14
Q

T/F the faster an object move the less momentum it has

A

false, the more momentum

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15
Q

T/F the larger a moving object mass, the more momentum it has

A

true

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16
Q

T/F the greater the momentum possessed by a system the more difficult it is to stop that motion

A

true, more force would have to be applied to stop a system with a large momentum

17
Q

if the velocity of an object is constant, its momentum is constant or not constant ?

A

constant

18
Q

if the external force = 0 the momentum is smaller, greater or constant

A

constant

19
Q

which type of force is present if all the object of a system are considered together as one system and what does it means

A

the force of all the object exert against each other are internal force and don’t affect the motion of the whole system

20
Q

which law can be restated as the principal of conservation of linear momentum

A

1st

21
Q

the law of conservation of linear momentum only applied when

A

in the absence of force

22
Q

what happened with the momentum of 2 objects if they collide together

A

the total momentum of the system just before collision equals the total momentum just after collision.

23
Q

what is a elastic collision

A

when the object collide and bounce off each other

24
Q

what is an inelastic collision

A

when the object collide and stick together

25
Q

in which type of collision the final velocity is the same

A

inelastic since the object stay tighter and move together

26
Q

result of a collision depend on

A

degree to which the object stick together and the elasticity of the object

27
Q

what is the velocity of separation

A

The velocity of separation is the difference between the velocities of the two colliding objects just after the collision. It describes how fast they are moving away from each other

28
Q

what is velocity of approach

A

is the difference between the velocities of the two colliding objects just before the collision. It describes how fast they are moving toward each other.

29
Q

what is the coefficient of restitution for a perfect elastic collisions

A

1.0

30
Q

what is the coefficient of restitution for a perfect inelastic collision

A

0

31
Q

what is linear impulse

A

. Impulse is the product of force and the time during which the force acts

32
Q

if the force applied is not constant impulse is

A

the average force times the duration of the average force.

33
Q

what produced a change in momentum of an object

A

The impulse produced by a net force acting over some duration of time

34
Q

a change of momentum implies a change in. what

A

velocity

35
Q

which parameters do we want to increase if we want to have a larger change of the velocity of an object

A

having a larger average net force act on the object or
by increasing the time during which the net force acts.

EXCI 351 (11 decks)

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