Motion

Distance/Displacement

100

How do you find distance?

Add all the paths together

200

If you walk 3 km east, and 4 km west, what is your distance traveled? 

7 km 

300

If a runner completes a 400 m track, what is their displacement if they return to the starting point?

0 m 

400

A hiker walks 6 km east, and then 8 km west. What is their displacement?

2 km west 

500

What is the difference between distance and displacement?

Distance: total length of the path traveled. 

Displacement: the direct path from start to finish

Speed/Velocity

100

If a car travels 120 km in 2 hrs, what is its speed?

60 km/hr

200

How is velocity different from speed?

Velocity must have a direction

300

If a cyclist travels 60 km north in 3 hours, what is their velocity?

20 km/hr North

400

If the object travels 45 m in 12 m/s. How long did it take them?

t = d/s 

(45 m) / (12m/s) = 3.75 SECONDS

500

A car is moving with a speed of 70 m/s. How far did the car travel in 9 seconds?

D = s x t

70 x 9 = 630 m

Acceleration

100

What is the equation for acceleration?

A = V_f-V_i / t

200

A car increases its speed from 20 m/s to 40 m/s in 2 seconds. What is its acceleration? 

V_f = 40 m/s, V_i = 20 m/s, t= 2 s

4+-20 / 2 =  20/2

= +10 m/s²

300

A car is traveling with a velocity of 56 m/s. After 5 seconds, the car comes to a stop. What is the acceleration of the car?

V_f = 0 m/s, V_i = 56 m/s, t= 5 s

0-56 / 5 = -56/5

= -11.2 m/s²

400

True/False

a car does not have an acceleration if it is making a right turn?

False

Acceleration happens when an object is SPEEDING UP, SLOWING DOWN, TURNING DIRECTIONS. 

500

What is the acceleration rule: 

i.e.: speeding up = ___ direction

slowing down = ___ direction

speeding up = SAME direction (+V,+A or -V,-A)

slowing down = OPPOSITE direction (+V,-A or -V,+A)

Motion Dot Diagrams

100

When an object is speeding up on a motion dot diagram: Are the dots getting closer together, farther apart, remaining constant.

Getting farther apart

200

When an object is slowing on a motion dot diagram: Are the dots getting closer together, farther apart, remaining constant.

Closer together

300

If an object is traveling in the negative direction. Which way do your arrows point? Right or left?

To the left

400

Draw a motion dot diagram for an object at rest

see motion dot diagram in google classroom

500

Draw a motion dot diagram for an object that starts with a constant speed in the positive direction. After 3 seconds they come to a stop. 2 seconds later the object is speeding up in the negative direction

See motion dot diagram in google classroom.

Motion Graphs

100

How can you tell if an object is moving in the negative direction on a velocity vs time graph?

When the graph is BELOW THE X-AXIS

200

Find the speed of an object using the following points pulled from a position vs time graph: 

(10,5) and (12,0)

Units are m/s

Point 1: 10,5

Point 2: 12,0

y₂-y₁/x₂-x₁

0-5/12-10 = -5/2 = -2.5 m/s

300

What does a flat line on a velocity vs time graph indicate about the object's motion?

The object is at a constant velocity! 

400

Draw a velocity vs time graph for the following description: 

Joe is walking towards home with a constant velocity. He hears his mother call for him, so he speeds up.

See graph in google classroom

500

Draw a position vs time graph that matches this description: 

Joe is running with a constant speed from his house. He ran 15 meters away and took a break to catch his breath. Then he runs home with a slower constant speed. 

See graph posted in google classroom.