Kinematics Flashcards

Motion in 1D and 2D.

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1
Q

Resultant Vector?

A

The single vector which has the same effect as the original vectors acting together.

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2
Q

Position?

A

Where an object is found, describing the location relative to a reference point in a frame.

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3
Q

Distance?

A

The total length of the path travelled.

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4
Q

Displacement?

A

The change in position. Considered as the shortest distance between the starting point and the end point in a specific direction.

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5
Q

Speed?

A

The rate of change of distance.

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6
Q

Velocity?

A

The rate of change of displacement.

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7
Q

Constant Speed?

A

Speed that doesn’t change over time.

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8
Q

Average Speed?

A

The total distance travelled divided by the total time.

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9
Q

Average Velocity?

A

The total displacement divided by the total time taken.

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10
Q

Instantaneous speed/velocity?

A

The speed/velocity at a specific point in time.

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11
Q

Acceleration?

A

The rate of change of velocity per unit time.

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12
Q

Constant Acceleration?

A

The velocity changes by a constant amount in each time interval.

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13
Q

Free Fall?

A

Motion (up or down) in the Earth’s gravitational field in which only the force of gravity acts on the object. Negligible air friction.

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14
Q

Terminal Velocity?

A

The maximum velocity reached by an object that is not in free fall. As in, air friction prevents anymore upwards motion.

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15
Q

Principle of Time Symmetry?

A

Objects take the same amount of time to reach their greatest height from the point of upwards launch as they take to fall back to the point of launch.

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16
Q

Projectile?

A

An object upon which the only force acting on it is the force of gravity.

17
Q

Point of Reference?

A

Where an object is thrown from or dropped. Initially, when displacement = 0 and time = 0 on a given graph.