P2.1 - Motion Flashcards

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1
Q

State the equation linking distance, speed and time. Give appropriate units.

A

Distance = Speed x Time

Distance (m), Speed (m/s), Time (s)

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2
Q

How can speed be calculated from a distance-time graph?

A

The speed is equal to the gradient of the graph.

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3
Q

What must be done to calculate speed at a given time from a distance-time graph for an accelerating object?

A

● Drawing a tangent to the curve at the required time.

● Calculating the gradient of the tangent.

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4
Q

State the equation for the average acceleration of an

object. Give appropriate units.

A

Acceleration = (Change in Velocity)/(Time Taken)

Acceleration (m/s²), Velocity (m/s), Time (s)

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5
Q

How can the distance travelled by an object be calculated from a velocity-time graph?

A

It is equal to the area under the graph.

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6
Q

What is a scalar quantity

A

A quantity that only has a magnitude

A quantity that isn’t direction dependant

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7
Q

What is a vector

A

A quantity that has a magnitude and direction

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8
Q

How are vectors drawn?

A

● As an arrow.
● The length of the arrow represents the magnitude.
● The arrow points in the associated direction.

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9
Q

Is force a scalar or a vector?

A

● Vector.

● It has both a magnitude and an associated direction.

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10
Q

Give three examples of vector quantities.

A
  1. Velocity
  2. Displacement
  3. Force
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11
Q

Give three examples of scalar quantities.

A
● Temperature
● Time
● Mass
● Speed
● Distance
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12
Q

How do you calculate average speed for non-uniform

motion?

A

Average Speed (m/s) = Change in Distance (m) / Change in Time (s)

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13
Q

What piece of apparatus may be used to record the time taken for a very fast object to move a given distance?

A

Light Gates

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14
Q

What is the equation of motion?

A

v2−u2=2aS

V= final velocity
u = initial velocity
a = acceleration
S = Distance covered by object
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15
Q

What is the formula for kinetic energy?

A

0.5 x Mass x (Speed)^2

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