Priest final biomechancs portion
If the force arm is 10x longer than the resistance arm in a 1st class lever, how much force is needed to move 1000 lbs?
100 lbs
In a 1st class lever, if the resistance arm is the same length as the force arm, how much force is needed to move 100lbs?
100 lbs
In this 2nd class lever, the FA is 10x the RA. What is the result of a 100kg force applied for a distance of 1m?
1000kg-.1m
How much work is done by moving 100kg a distance of 10m?
1000kgm
In this 1st class lever, the fulcrum is in the center. What is the result of a 100kg force applied thru 2m distance?
100kg-2m opposite direction
How far will a shot put fall in 1 second?
16 feet
What is the velocity (ft/sec) of an object which free falls for 6 seconds?
192
What class lever and what advantage is demonstrated by the elbow during tricep extensions?
1st class/distance
Elbow extension is an example of what lever and advantage?
1st class/distance advantage
What class of lever and what advantage is demonstrated by the quarterback's elbow throwing a forward pass?
1stclass distance
A resultant is a term to describe the combined effect of:
2 or more vectors
How much force is needed to bench press 200 lbs?
200 lbs
A ball was dropped from the top of the Astrodome and took 3.9 seconds to hit the ground. From what height was it dropped?
243 feet
During elbow flexion, what force must be generated by the biceps to life a 25kg dumbbell if the FA is 0.1m and the RA is 0.5m?
25 kg
What class of lever and what advantage is demonstrated by the ankle (heel raises) during the standing squat?
2nd class/force
What is the average power output of a 75kg athlete to run 400m in one minute (kgm per minute)?
30000
How far will a shot put dropped off of the football stadium bleachers fall in 4.5 seconds?
324 feet 99 meters
What class lever is represented by elbow flexion?
3rd class
Knee extension is what class lever and what advantage?
3rd class lever/distance advantage
What class lever and advantage is demonstrated by the elbow during bicep curls?
3rd class/distance
What class lever and advantage is demonstrated by the wrist of the basketball player shooting a jump shot?
3rd class/distance
What class lever and what advantage is demonstrated by the knee during the hamstring curl?
3rd class/distance
What class lever and what advantage is demonstrated by the shoulder during the bench press?
3rd class/distance
What class of lever and advantage is demonstrated by the knee kicking a ball?
3rd class/distance
What is the power output required for a 186 lb athlete to lift 200lbs a distance of 2 feet in 1 second (ft x lbs per second)?
400
How much work is accomplished by moving 200 kg a distance of 200 m?
40000 kgm
What is the velocity of an object (in ft/sec) which has free-fallen for 1.41 seconds?
45
A golf ball was hit with a 9 iron and stayed in the air for 3.5 seconds. What height (in feet) did it reach?
49 feet
During knee extension, the RA is 10x the FA. What is the results of the quads contracting with a force of 500kg for 0.1m?
50kg - 1m
A ball reaches a height of 155 ft, how long will it be in the air from when it was kicked to when it hits the ground?
6.2
An arrow shot straight up to a height of 52 feet will stay in the air how many seconds?
6.2 seconds
What is the power output during lifting a 220lb barbell 2m in 2 seconds (kgm per minute)?
6000
Velocity is distance per unit of time (v=s/t); what is the average velocity of a sprinter who runs 220 meters in 20 seconds?
660 meters per minute
A golf ball was hit with a 3 iron and was in the air for 4.3 seconds. What height did it reach?
74 feet
What is the power output of a 110lb athlete to jump over a 0.5m high bar 30 times in a minutes (kgm per minute)?
750
What is the total distance traveled (in meters) for an object which has dropped for 4.3 seconds?
9 L
A golf ball was hit with a 6 iron and was in the air for 4.8 seconds. To what height did the ball go?
92
Identify a first class lever; fulcrum is:
between force and resistance
What a 1st class lever, identify a possible solution if the force does not overcome the resistance?
bigger force longer FA
When the study of mechanics is limited to living things, especially the human body, it is called:
biomechanics
In a 1st class lever, if the fulcrum is closer to the force:
change direction increase distance decrease force
If the resistance arm in a 3rd class lever is 10x the force arm:
distance increases 10x
If a 2nd class lever has FA>RA, what's the advantage (gain)?
force
Identify units expressing power output:
kgm per min
Of the factors equal, which is more stable?
lower center of gravity wider base
Identify a possible solution if the force on a 3rd class lever does not overcome the resistance.
shorter ra longer ea more force
Vectors may be combined by:
subtraction multiplication
Quantities which have both magnitude and direction are called:
vectors
