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WorksheetsProjectiles & Balance
Total questions: 20
Worksheet time: 20mins
A projectile is an object propelled into the air or water by an external force
True
False
Not exactly
I have no idea
What are the two (2) naturally occurring forces acting on a projectile?
Air resistance and friction
Air resistance and gravity
Air resistance and force
Air resistance and wind resistance
The path of a projectile is referred to as its..?
Flightpath
Velocity
Parabola
Trajectory
What three (3) factors determine the flight path of a projectile?
Force of release
Angle of release
Acceleration of release
Speed of release
Height of release
For a projectile to achieve maximum distance, the theoretical optimal angle of release would be
< 45o
45o
> 45o
High jump and pole vault would require an angle of release that is..?
< 45o
45o
> 45o
What will happen to the trajectory of a projectile if the height of release is greater (higher) than the landing height?
the projectile will take less time to reach its peak than it takes to land
the projectile will take the same amount of time to reach its peak as it takes to land
the projectile will take more time to reach its peak than it takes to land
the projectile will not reach its peak
The ability to neutralise forces that disturb equilibrium is called?
Stability
Balanced forces
Balance
Static stability
What is dynamic stability?
when an object is at rest and not moving with linear or angular motion
when an object is in motion and moving with linear or angular motion
when an object is at rest and it moving with linear or anguar motion
when an object is in motion and not moving with linear or angular motion
The theoretical point in an object at which its entire mass appears to be concentrated
Centre of gravity
Line of gravity
Base of support
Centre mass
Centre of gravity can be outside the body
True
False
Not exactly
I have no idea
Stability is greatest when, ...?
Base of support is narrow, centre of gravity is low
Base of support is wide, centre of gravity is high
Base of support is wide, centre of gravity is low
Base of support is narrow, centre of gravity is high
Balance and stability can be affected by these three (3) factors
mass of the object
position of LOG relative to BOS
size of BOS
mass of the COG
Balance and stability can be affected by these two (2) factors when faced with an oncoming force
Move the height of the COG towards the oncoming force
Increase BOS in direction of oncoming force
Position COG near edge of BOS in the opposite direction of oncoming force
Position COG near edge of BOS in direction of oncoming force
Which image shows a greater BOS?
A
B
Sumo wrestlers have excellent stability due to their..?
Low centre of gravity
Wide base of support
Increased mass
Increased force
Which image shows a more stable position?
A
B
Which line indicates the Line of Gravity?
A (orange line - vertical)
B (blue line - horizontal)
Which of these lines (red, yellow, blue) indicates an angle of release that is >45o
Red line
Yellow line
Blue line
Which of these lines (red, yellow, blue) would best represent the angle of release needed for a basketball free throw?
Red line
Yellow line
Blue line
