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q2 Flashcards

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1
Q

Forces that act on a certain object is always in ——.

A

equilibrium

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2
Q

TYPES OF FORCES (4)

A

push and pull

normal force

friction

torque

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3
Q

➔ The state of being stretched tight.
➔ The force that a string or rope exerts.

A

Tension

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4
Q

formula of torque

A

T = F x L

torque = moment of inertia * angular acceleration

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4
Q

➔ The force that opposes the motion of an object
➔ Refers to the force resisting the relative motion of solid surfaces, fluid layers, material elements sliding against each other

A

Friction

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4
Q

➔ Applies action-reaction repair.

A

Tension

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5
Q

➔ Always the direct opposite of the weight of the object.
➔ The perpendicular contact force that a surface exerts on another surface.

A

Normal force

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6
Q

➔ The study of the motion of objects

A

Mechanics

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6
Q

types of friction

A

kinetic and static

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7
Q

As we walk on the ground, we exert force unto it but the ground also exerts the same amount of force unto us; this is an example of ———.

A

normal force

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8
Q

➔ The rotational equivalence of force.

A

Torque

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8
Q

in a vacuum space,
anything you drop will fall at the same time. But in reality, whatever has less resistance which may be through taking up less surface area will reach the ground first

A

Freefall motion:

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9
Q

➔ A force applied to a point on an object about the axis of rotation.

A

Torque

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10
Q

: Motion of an object
along a straight line.

A

Rectilinear motion

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11
Q

➔ a branch of mechanics that describes the motion of objects using words, diagrams, numbers, graphs, and equations.

A

Kinematics

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12
Q

motion of an object along a curved patb

A

curvillinear motion

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13
Q

When an object is thrown at different angles, it can result to different projections.

A

Projectile motion:

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14
Q

when you twirl something around, you have to maintain constant force for its path to be uniform.

A

Uniform circular motion:

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15
Q

➔ How much ground an object has covered
➔ How far you have traveled regardless of
direction
➔ Total ground covered
➔ SI unit: meters (m)

A

Distance

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16
Q

➔ How fast an object is moving.
➔ How fast or how slow an object has
covered a certain area.
➔ Rate at which an object covers distance

A

Speed

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17
Q

➔ How far out an object is.
➔ Where you are (direction) in relation to
where you started.
➔ Total straight-line distance from the start
to the end position.

A

● Displacement

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18
Q

➔ How fast and which way; the rate at which
position changes.
➔ Rate at which an object changes its
position.

A

Velocity

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18
Q

formula of acceleration

A

a = vf - vi / t

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19
Q

The change in velocity may be achieved in 3 ways:

A

Change in speed (as in a rectilinear motion)

Change in direction (as a uniform circular motion)

Change in both speed and direction (as in a curvilinear motion.

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19
Q

refers to the change in velocity of a moving object per unit of time.

A

acceleration

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20
Q

When will acceleration be equal to 0?

A

➔ When an object in motion’s speed is constant.
➔ When an object is at rest.

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21
Q

Acceleration is positive when the object is speeding up and at the same time it moves in a forward direction

t or f

A

true

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22
Q

speef can either be positive or negative unlike acceleration which is always positive.

t or f

A

false

Acceleration can either be positive or negative unlike speed which is always positive.

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22
Q

Acceleration is negative when the object is decelerating and/or the object is moving towards the opposite direction (towards south or west)

t or f

A

true

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23
Q

If an object is slowing down, then its
acceleration is in the same direction of its motion.

t or f

A

If an object is slowing down, then its
acceleration is in the opposite direction of its motion.

false

23
Q

If an object is speeding up, then its
acceleration is in the opposite direction of its motion.

t or f

A

If an object is speeding up, then its
acceleration is in the same direction of its motion.

false

24
Q

★ An increase in velocity over time;
the object is speeding up.

A

Positive acceleration

25
Q

A decrease in velocity over time;
the object is slowing down.

A

Negative acceleration / deceleration

26
Q

➔ Also referred to as constant acceleration
➔ Motion where velocity changes by equal
amounts in equal time intervals
➔ Uses kinematic equations

A

Uniform Accelerated Motion

26
Q

★ No change in velocity; the object
moves at a constant speed or remains stationary.

A

Zero acceleration

27
Q

➔ When an object falls under the influence of gravity alone, it is in a state of ———.
➔ In the absence of air resistance, all objects falling near the earth’s surface fall with a constant acceleration

A

FREE FALL MOTION

28
Q

3 KINDS OF FREE FALL

A

➔ When the object is dropped from rest

➔ When the object is thrown vertically upward

➔ When the object is thrown upward at an angle to the horizontal

29
Q

2 COMMON CONDITIONS IN FREE FALL

A

➔ If an object is merely dropped from an elevated height
➔ If an object is thrown upwards in a perfectly vertical direction

30
Q

➔ The motion of the objects involved 2 dimensions, these 2 dimensions are the x and y axis or horizontal and vertical motion.

A

PROJECTILE MOTION

30
Q

When an object is launched at a particular angle horizontally, it follows a trajectory or a path which creates what we call the ——–

A

projectile motion

31
Q

projectile motion: The shape is usually called the ———, this varies (wideness or steepness of the angle) depending on the angle that the object is launched.

A

parabola

32
Q

in projectile motion, as the object moves upward, it moves backward

true or false

A

false

As the object moves upward, it moves forward as well

33
Q

1: at the end of the parabola, the maximum height or the vertical displacement can be observed.

2: when the object reaches max height, the velocity will be equal to 0. When the object’s velocity hits 0, that’s when it begins to go back down again.

both true
true false
both false
false true

A

false, true

Halfway through the parabola, the maximum height or the vertical displacement can be observed (hmax).

when the object reaches max height, the velocity will be equal to 0. When the object’s velocity hits 0, that’s when it begins to go back down again.

34
Q

in a projectile motion, horizontal velocity changes

true or false

A

false

in a projectile motion, horizontal velocity is constant

35
Q

what component of projectile motion is this:

Covers equal displacement in equal time periods

A

horizontal velocity component

36
Q

When an object is thrown horizontally, it will not follow a straight path. This is only possible with the absence of gravity.

true or false

A

true

37
Q

➔ Total vertical displacement of a projectile.
➔ Is usually half of the parabola.

A

Maximum height ( H ) / (hmax)

37
Q

what component of projectile motion is this:

Changes (due to gravity). Does not cover equal displacements in equal time periods

Both the magnitude and direction change

A

vertical velocity component

38
Q

it is the height or space between two points measured straight up or down.

A

Vertical distance

38
Q

➔ How far the object is from the place it was launched from.
➔ the straight-line distance between two points measured along a flat, level surface.

A

Horizontal Distance

38
Q

➔ Total horizontal displacement of a
projectile.
➔ The distance from the place it was
launched to where it lands.

A

Range(R)

39
Q

➔ The time needed or time spent when the object travels certain portions in the trajectory

A

Time of flight (t)

40
Q

➔ The velocity v of a body moving in a circular path with radius of curvature r at any instant is directed tangentially.
➔ The direction of ———– is always changing, but its magnitude may or may not be constant

A

TANGENTIAL VELOCITY

40
Q

➔ Time elapsed of an object from the start
of the launch until it hits the ground.

A

Total time of flight (ttotal)

40
Q

2 TYPES OF A PROJECTILE MOTION

A

● Projectie motion 1 (horizontally launched)
● Projectile Motion 2 (vertically launches at an angle)

41
Q

➔ The object moves horizontally and
vertically upward or downward (after object reaches peak)

A

Projectile Motion 2

42
Q

➔ Refers to the motion of a body turning about an axis, where each particle of the body moves a circular path.
➔ This is also known as uniform circular motion

A

Rotation

43
Q

To measure a circle, you must consider: (2)

A

★ The circumference of the circle
★ The radius of the circle

43
Q

When an object is moving in a uniform circular motion, the object that is turning is able to complete a revolution, this revolution is actually the ———– of the circle that is created.

A

circumference

43
Q

➔ The ratio of the distance traveled along the circumference to the circle’s radius.

A

ANGULAR DISPLACEMENT

43
Q

These quantities are expressed in the context of the rotational motion

A

TRANSLATIONAL AND ROTATIONAL MOTION

44
Q

➔ ——- use angular quantities to describe circular motion
➔ ——– letters are used to represent the angular quantities

A

Physicists
&
Greek

45
Q

➔ A straight line that passes through a point on the sides of the circle or on the circle

A

Tangent

46
Q

The point where the tangent line and the circle meet is called the —–

A

point of tangency.

47
Q

➔ Responsible for the changes in the linear speed of a given body

A

TANGENTIAL ACCELERATION

48
Q

➔ Acceleration with respect to the tangent.

A

TANGENTIAL ACCELERATION

49
Q

➔ Accounts for changes in the direction of the velocity
➔ This accounts for the changes in the velocity towards the center of the circle

A

RADIAL/CENTRIPETAL ACCELERATION

49
Q

➔ The object is attracted to the center

A

Centripetal

50
Q

➔ Is the force applied away from the center of a circular motion

A

Centrifugal Force

50
Q

➔ The force applied toward the center of a circular motion

A

● Centripetal force

51
Q

➔ Physics is concerned with the motion of objects and the quantitative analysis of that motion

A

RELATIVE MOTION

51
Q

➔ The object that we pretend is still as we assess the motion of other objects relative to this inertial reference frame

A

Inertial Reference Frame

51
Q

he was the first to describe relative motion.

A

Galileo Galilei

51
Q

velocity measurements depend on the inertial reference frame that you adopt.

A

GALILEAN RELATIVITY

gen physics - chloe (5 decks)

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