when distance of an object changes in relation to another object
Motion
DAILY DOUBLE
What is the formula for calculating speed
speed = distance / time
A push or pull on an object due to its interaction with another object.
A straight line on a motion graph represents what?
Constant speed.
Send someone to the board to draw the speed triangle.
(teacher will judge)
a place or object used for comparison to determine if something is in motion
Reference Point
The speed and direction of an object's motion.
Velocity
The type of force that results in a change in motion.
Unbalanced force
A line curving up on a motion graph represents what?
Acceleration (speeding up)
A bird flies 40 km in 2 hours. What is its speed?
S = distance / time
S = 40km / 2 hr
S = 20 km/hr
DAILY DOUBLE
How is speed different from velocity?
Velocity is speed in a given direction.
4,000 m = ______ km
4 km
Do you add or subtract forces that are acting in the same direction?
Add
A steeper slope represents _____ speed.
Faster
How will friction affect average speed?
It will cause speed to decrease (deceleration)
What are the metric units for distance?
Kilometer, meter, centimeter
Name 1 distance unit, 1 time unit & 1 speed unit
Correct answers include:
km, hour, km/hr
m, sec, m/s
If a car's engine is applying 100N of force to the right and the wind is applying 75N of force to the left, what is the net force and direction of movement of the car?
Net Force = 100N - 75N = 25N to the right
On a distance graph, how do you show a stationary object?
With a horizontal line
DAILY DOUBLE
How do you calculate average speed over a journey?
Average speed = total distance / total time
Define acceleration.
Change in speed and/or change in direction.
Name a reference point in this room that you could use to describe your motion.
Whiteboards, Cabinets, Windows, Door
What happens to an object when the forces acting on it are balanced?
The object does not change its motion or direction.
Draw a graph that shows a person walking to a bus stop, waiting for a few minutes, then running back home to get their lunchbox.
(teacher will judge the graph)
Calculate the average speed:
0 m ; 0 sec
10 m ; 10 sec
50 m ; 50 sec
150 m ; 150 sec
Average speed = total distance / total time
Avg speed = 150 m / 150 sec
Avg speed = 1 m/sec