IPC review

​Distance - The sum of all steps, meters, centimeters, miles or kilometers travelled
Distance is a scalar.

Displacement - the difference in position from the starting point to the end point.



Displacement is a vector and needs direction.

​The magnitude of displacement is always smaller or equal to the magnitude of the distance

​In this example, the starting point is A and the ending point is C.

The distance is the sum of 4m + 3m, which makes 7 meters.


The displacement, however, is the difference in position between points A and C, which is 5 meters NE

​How did we find "5m" ? The "inclined" line, which is the hypotenuse in a right triangle, is found by using the Pitagorean Theorem (a² + b² = c²) . In this example, it would look like this: 42 + 32 = c2 > 16 + 9=c2 > 25= c2 > c = √ 25
c = 5 m
√

​Displacement can be zero (0) when the final position of the object is the same as its initial position

Drag and Drop

What is your distance if you move from A > H > B > C? (assume each square is 1 m)​ ​ ​

Placeholder

Drag these tiles and drop them in the correct blank above

8 m

16 m

8

16

Multiple Choice

What is your displacement if you move B > C > B

• zero

• • 2m

• 4 m

• 2 m backwards

Multiple Choice

What is your distance and displacement if you move A > H > F? assume each square is 1 m

• distance = 7 m

  displacement = 7 m

• distance = 7 m

  displacement = 5 m NE

• distance = 7 m

  displacement = 10 m N

• distance = 7 m

  displacement = 25 m

​Speed and velocity show the relationship between a distance travelled in a certain period of time. Therefore, speed and velocity need to show a number with two types of information: the distance AND the time. This is why we say meters per second (m/s), miles per hour (mph), etc.

East, down, to the left, upwards are examples of ways to tell the direction.

Multiple Choice

A plane takes 12 hours to fly 86,000 km. What is the plane`s speed?

• 860 m/s

• 920 m/s

• 7,167 km/hr

• 10,320 km/hr

​When you rearrange the formula for speed (or velocity), you can also find distance (or displacement) and time.

Multiple Choice

What is the speed of a jet plane that travels 528 meters in 4 seconds?

• 132 m

• 2112 m/s

• 132 m/s

• 121 m/s

Multiple Choice

How long will your trip take (in hours) if you travel 350 km at an average speed of 80 km/hr?​

• 4 hours 37 minutes

• 4 hours 38 minutes

• 4 hours 22 minutes

Multiple Choice

 How far (in meters) will you travel in 3 minutes running at a rate of 6 m/s?

• 18 km

• 2 m

• 18 m

• 0.5 m

​Relative speed is the speed of a moving object in respect to another. If the two objects are moving in the same direction, their relative speed is their difference. When they are moving in opposite directions, their relative speed is the sum of both.

Multiple Choice

What is the speed of the red car relative to the green car?

• 10 m/s

• -10 m/s

• 60 m/s

• 30 m/s

​ Acceleration

Multiple Choice

A ball rolls down a ramp for 15 seconds.  If the starting speed of the ball was 0.8 m/sec and the 

final speed was 7 m/sec, what was the acceleration of the ball ?

• 0.41 m/s/s

• 0.52 m/s/s

• 117 meters

• 93 m/s

Dropdown

What is being compared in this graph?​

Select answer

​There are more types of forces, like air resistance, buoyancy, tension.

​If you would need to calculate net force, a great first step would be drawing a free-body diagram so you would know what to add, what to subtract

Draw

Draw the free-body diagram for a box that is STANDING on the floor

Draw

Draw the free-body diagram for friction prevents a book from sliding

Draw

A man is trying to push a box along the floor

Draw

A piñata is hanging from the ceiling

Fill in the Blanks

Calculate the direction and net force acting on the bike.

Draw

Calculate the direction and net force acting on the bicycle.

Draw

Calculate the direction and net force acting on the kite.

Multiple Choice

Which of the following free-body diagrams is correct for an automobile accelerating to the

right on a straight level road?

W = weight of automobile

N = normal force

L = force on automobile to left

R = force on automobile to right

​Work is measured in Joules

​Power is measured in Watts

Multiple Choice

It takes a power lifter 1.5 seconds to lift 930 Newtons to a height of 1.4 meters. How many

watts of power did the lifter expend?

• 868 Watts

• 1302 N

• 1302 J

• None of the answers

Multiple Choice

A meteor moves from a distance of 2 earth radii to a distance of 8 earth radii from the

center of the earth. The new gravitational force between the earth and the meteor is

• 1/16 as great as the old force

• 1/4 as great as the old force

• 4 times greater than the old force

• 16 times greater than the old force

Multiple Choice

As clothes in the dryer tumble and rub back and forth, electrons are scrubbed from one

object to another. Why do they clothes stick together?

• The friction between the clothes binds them together.

• The electrons form a bond that is shared between the clothes.

• There is an overall positive charge on one item of clothes that loses electrons and it is

  attracted to the piece that has an overall negative charge from gaining electrons.

• The weak nuclear force holds these items together.

​Relationship between Potential energy and Kinetic energy

Draw

Calculate the kinetic energy of a 50 kg runner moving at a velocity of 10 m/s. Show your work

Multiple Choice

If you walk around the school to observe and classify the different types of energy present in the many different situations found in a campus, what would your report say:

• All objects with kinetic energy can be found in high places.

• All objects with kinetic energy are moving

• All objects with kinetic energy are microscopic.

• All objects with kinetic energy are hot.

​https://www.youtube.com/watch?v=LL54E5CzQ-A

Multiple Choice

As a lake freezes, heat is released into the surrounding air.

Given: Lf = 334 kJ/kg

Calculate the amount of thermal energy released when 30,000 kg of water freezes.

• 90 kJ

• 1 x 10⁷kJ

• 3 x 10⁶ kJ

• 30,334 kJ

Multiple Choice

What equipments would you need to calculate the kinetic energy of a student running the track?

I. Metric bathroom scale

II. Stopwatch

III. Metric tape measure

IV. Digital temperature probe

V. Barometer

• II & III

• I & IV

• II & V

• I, II, & III