Forces and motion
Speed
Describing movement
Turning forces
Pressure
100
When two forces are balanced, they are______ in size and ________ in direction
equal, and opposite
100
What is the equation for speed? What about the units?
speed=distance/time
m/s
100
How far did the boat travel crossing the lake once?
80 meters
100
True or False: There has to be a capital N and a lowercase m for moment units to be correct?
Ex: Nm
True, the correct way to write it is with a capital N, and a lowercase m
Nm
100
True or False:
Atmospheric pressure is greatest at sea level?
True
200
If a force is unbalanced, what happens to these forces to cause them to be unbalanced?
Change of speed, change of direction
200
Calculate the speed:
Spider man swings 2000 meters across the city in 25 seconds
80 m/s
200
Calculate the speed after the boat crossed the lake for the first time?
2 m/s
200
What can cause a moment or a turning force?
A door handle opening the door
200
What is the equation for pressure? What about the units?
Pressure= Force/surface area
N/m^2
300
An object has balanced forces acting on it, describe ways in which it can be balanced?
Constant speed, straight line, object can be stationary
300
Eric is running from a monkey. He travels 20 m in 5 seconds. What is his speed?
4 m/s
300
How much time did the boat spend stopped/stationary?
60 seconds
300
What does the term moment mean?
The turning effect of a force
300
As the depth of a liquid increase, what happens to the pressure?
The pressure increases
400
Which of the following describes a balanced force?
Yadier Molina catching behind home plate
Messi crossing up Ronaldo
Serena Williams hitting a tennis ball
Yadier Molina catching behind home plate
400
Describe the speed in graph A and graph B
Graph A: Stationary, at rest
Graph B: Constant speed
400
State the distance between station A & station B
50 km
400
What is the equation for moment? What about the units?
Moment= Force x distance
Nm
400
Which shoes would be best for not sinking in the snow? Why?
B, because it has a larger surface area which decreases pressure
500
Which 2 diagrams are unbalanced forces?
Diagram C, and Diagram D
500
Describe the speed in graph C and D?
Graph C: Increase in speed
Graph D: Decrease in speed
500
State the time taken to travel between station A and station B
2.0 hours
500
Calculate the moment? Force =15 N distance= 0.8m
12 Nm
500
Calculate the pressure:
Eric's computer has a weight of 12 N. The area of the bottom of the computer is 0.20 meters squared
60 N/m^2