SCIENCE 10 – PHYSICS UNIT REVIEW



Science 10 – Physics Review

UNIFORM MOTION

← Define displacement (change in position, Δx), time interval (Δt), and  velocity (vav) 

Displacement –

Unit (

Time Interval –

Unit (

Velocity –

Unit (

← Explain the difference between displacement (change in position) and distance.

Example:

What is the distance travelled by the object after 15 seconds?

What is the displacement of the object after 15 seconds?

What is the distance travelled by the object after 14 seconds?

What is the displacement of the object after 14 seconds?

← Read and explain the information found on a position-time graph (ie. positive, negative and zero slope and the motion and direction described)

← Calculate average velocity by finding the slope of a position-time graph

What information does a position-time graph tell us?

1.

2.

3.

Examples: How far has the object travelled after 6 seconds?

How long did it take the object to reach 10 m [N]?

What is the average velocity of the object between 0 and 4 seconds?

What is the average velocity of the object between 4 and 6 seconds?

What is the average velocity of the object between 7 and 13 seconds?

What is the average velocity of the object between 13 and 15 seconds?

Slope( POSITIVE ZERO NEGATIVE

← Take data and plot a position-time graph and draw a line of best fit

What is the position of the object at 5 seconds? What is the average velocity of the object?

← Explain the difference between directional motion (vector) and magnitude (size/amount)

Scalar (

Vector(

← Solve for each variable when using the vav = ∆d/∆t

Variations of the Average Velocity Formula:

1. If a kayak has an average velocity of 5.0 m/s [S], what is its displacement after 27 s?

2. How long does it take to run forward 430 m if the runner’s forward velocity is 4.3 m/s?

3. What is the average velocity of an arrow that travels 9 m [N] in 0.20 s?

| | |

ACCELERATED MOTION

← Explain what acceleration is in terms of changes in velocity

Positive [pic] (

Zero [pic] (

Negative [pic] (

← Give more than one real-life example of positive acceleration, negative acceleration, and constant acceleration.

← Explain that upward motion is positive and downward motion is negative.

← Explain what acceleration due to gravity is and that it is -9.80 m/s2

1. What is the change in velocity of a raindrop that falls for 4.0 s?

2. A ball is thrown up into the air. How much time does it take to go from 12 m/s up to 3.0 m/s up?

3. A rock is thrown up into the air with an initial velocity of 11 m/s up. What will be the rock’s velocity after 0.75 s?

← Determine ∆v (change in velocity) by using vf - vi

← Use the acceleration formula (a = ∆v/∆t) to determine acceleration for different data sets and given information

1. A bicycle is travelling east at 10 m/s. How much time would it take for the bicycle to increase its velocity to 17 m/s [E] if it accelerated at 3.0 m/s2?

2. A car starting from rest accelerates uniformly to 8 m/s [N] in 4.0 s. What is the car’s acceleration?

3. A skateboarder moving 6.0 m/s forward begins to slow down, accelerating at -1.5 m/s2 for 2.5 s. What is the skateboarder’s velocity at the end of 2.5 s?

← Plot a velocity-time graph

← Determine the slope (acceleration)

0s – 2s (

2s – 3s (

3s – 6s (

6s – 10s (

← Explain what the slope is telling us [positive = increasing constant acceleration, negative =decreasing constant acceleration, zero = constant speed]

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