Kinesiology 3390

How long does it take for a free-falling object to drop from a height of 300 feet (rounded to nearest tenth of a second)?

4.3 s

What is the power output required for a 186lb athlete to lift 200 lb a distance of 2ft in 1 second (ft X lbs per second) ?

400

What is the power required to lift 200 lbs 2 feet in 1 second?

400 ft*lbs/sec

How much work is accomplished by moving 200kg a distance of 200m?

40000 kg*m

What is the velocity of an object (in ft/sec) which has free-fallen for 1.41 seconds?

45

Identify the formula for calculating the effort required on a 2nd class lever to lift 100 lbs.

E = (R X RA) / EA

The electrical signal obtained from surface electrodes over the belly of muscles is called:

EMG

Other factors equal, which is more stable? more narrow base of support longer line of gravity Lower center of gravity line of gravity closer to edge of support higher center of gravity

Lower center of gravity

The EMG obtained from this stroke survivor illustrates muscle activity. The peak-to-peak height of each of the emg signals are recorded and called ___________ and is measured in millivolts.

amplitude

What muscle was used to compare emg in the strong vs. the paralyzed arm?

anterior deltoid

Identify a first class lever; fulcrum is:

between force and resistance

With a 1st class lever, identify a possible solution if the force does not overcome the resistance?

bigger force and/or longer FA

When the study of mechanics is limited to living things, especially the human body, it is called

biomechanics

In the EMG video, what was the color of the emg obtained from the paretic (paralyzed) muscle?

blue

How do you recognize a 3rd class lever?

effort is in the middle

What action of the body demonstrates a 1st class lever?

elbow extension

In able-bodied individuals while arm-cycling, the power from the right and left arms alternates and the emg is essentially the same magnitude and duration, just off by 180 degrees. In the stroke survivor on the video:

emg as the similar but overlapping

How could you increase the force of a 3rd class lever?

extend the effort arm

What are units of Work?

foot*pounds

A Newton is a measure of ______________?

force

If a 2nd class lever has a FA longer than the RA, what's the advantage (gain)?

force

2nd class levers always gain:

force/ effort

Identify units of acceleration.

ft/sec/sec

In the Canvas Video on Levers, what is illustrated by the leverage in the bicep curl?

gain speed

The color of the emg obtained from the unaffected muscle was illustrated in:

green

In a first class lever, if the fulcrum is closer to the force:

increase distance

How could you increase the force of a 2nd class lever?

increase the length of the EA

Recent emg research in our Lab for Wellness and Motor Behavior (LWMB) was published in which professional journal?

international journal of health sciences

Identify units expressing power output:

kgm per min

Identify units used in measuring force.

pounds, kilograms, Newtons

Kilogram meters per second is a measure of ____________________?

power

Identify the Newtonian equation to calculate the distance traveled by a free-falling object.

s=(1/2 a) t squared

Identify a possible solution if the force on a 3rd class lever does not overcome the resistance.

shorter RA

Vectors may be combined by

subtraction

A punter has a "hang-time" of 5.3 seconds; to what height (in feet) did the ball go?

112

During elbow flexion, what force must be generated by the biceps to lift a 25kg dumbbell is the FA is .1m and the RA is .5m?

125 kg

How fast is a free-falling object going after 4 seconds (ft/sec)?

128

The velocity of an object that has dropped in a vacuum for 4.5s is feet per second (no decimals).

144

How far will a 30.06 rifle bullet (traveling 2800 ft/sec) drop in one second (feet)?

16

Under ideal conditions, a 100mph tennis ball will drop [x1] feet in one second (no decimals).

16

How far will a shot-put fall in 1 second?

16 ft

In what century did Sir Isaac Newton develop the equation for gravitational acceleration?

17th

What is the velocity (ft/sec) of an object which free falls for 6 seconds?

192

A lever with the fulcrum between the effort and the resistance is a [x1] class lever.

1st

What lever is identified by the fulcrum between the effort and the resistance?

1st class

What class lever and what advantage is demonstrated by the elbow during tricep extensions?

1st class/ distance

What class of lever and what advantage is demonstrated by the quarterback's elbow throwing a forward pass?

1st class/ distance

Elbow extension is an example of what lever and advantage?

1st class/ distance advantage

If you exert 100 lbs effort on a 1st class lever that has EA=10 and RA=1, how much force is applied on the other end of the lever?

1000 lbs

A resultant is a term to describe the combined effect of

2 or more vectors

In this 2nd class lever, the FA is 10x the RA--what is the result of a 100 kg force applied for a distance of 1m?

1000kg -.lm

What is the rate of vertical deceleration of a baseball as it leaves the batter's bat (ft/sec/sec)?

-32

A baseball throw delivered at 100 mph reaches the mitt in .25 seconds. How far will the ball drop (neglecting air resistance, spin, etc.)?

1 ft

If the arrow is in the air for .8s, the archer who shoots at a 40 yard target aims [x1] feet above the target. Round your answer to one decimal.

10.2

What is the power output during lifting a 220 lb barbel 2m in 2 seconds (kgm per second) ?

100

If the force arm is 10x longer than the resistance arm in a 1st class lever, how much force is needed to mover a 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 100 lbs?

100 lbs

How much work is done by lifting 100kg a distance of 10m?

1000 kg*m

How much force is needed to bench press 200 lbs?

200 lbs

Which workout requires the greatest power output--lifting_________________? 100 lbs 3 feet in 1 second 200 lbs 2 feet in 2 seconds 200 lbs 2 feet in 1 second 200 lbs 2 feet in 3 seconds

200 lbs 2 feet in 1 second

How much work is accomplished if you lift 200 lbs. a distance of 10 feet.

2000 ft*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 ft

How much force was required on the Total Gym for the 200 lb. subject to lift his body weight up the 1:8 slope (1 foot rise in 8 foot run)?

25 lbs

Choose the workout that requires the most work--lifting: 200 lbs 4 feet 250 lbs 4 feet 100 lbs 9 feet 150 lbs 6 feet

25o lbs 4 feet

The wheelbarrow is an example of what class of lever?

2nd

What class of lever and what advantage is demonstrated by the ankle (heel raises) during the standing squat?

2nd class /force

A ball reaches a height of 155 ft, how long will it be in the air (sec) from when it was kicked to when it hits the ground?

3.1 s

What is the power output required for an athlete to lift 300 lbs. 2 feet in 2 seconds (in ft*lbs/sec)?

300 ft*lbs/sec

What is the average power output of a 75kg athlete to run 400m in one minute (kgm per minute)?

30000

What is the rate of acceleration of a free-falling object (ft/sec/sec)?

32

How far will a shot-put dropped off of the football stadium bleachers fall in 4.5 seconds?

324 ft

A 3-iron shot from the fairway stayed in the air 3s. It reached a height of [x1] feet.

36

Elbow flexion is an example of what class lever?

3rd

What class lever is represented by elbow flexion?

3rd

Knee extension is what class lever and what advantage?

3rd class lever, distance advantage

What class Lever and what advantage is demonstrated by the shoulder during the bench press?

3rd class/ distance

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 of lever and advantage is demonstrated by the knee kicking a ball?

3rd class/ distance

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

During knee extension, the RA is 10x the FA--what is the result of the quads contracting w/ a force of 500kg for .1m?

50kg -1m

An arrow shot straight up to a height of 152 feet will stay in the air how many seconds?

6.2

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

A golf ball was hit with a 3 iron and was in the air for 4.3 seconds. What height did it reach (nearest whole number)?

74 ft

What is the power output of a 110 lb athlete to jump over a .5m high bar 30 times in a minute (kgm per minute) ?

750

What is the initial vertical velocity of a punt which has a "hang time" of 4.8 seconds (v=at)?

77 ft/sec

The acceleration (a) of a free falling object is 32 f t/sec/sec. What is the initial- vertical velocity (v) of a punt which has a "hang time" of 5.5 seconds (v=at)?

88 ft/sec

What is the total distance traveled (in meters) for an object which has dropped for 4.3 seconds?

91

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

After viewing the EMG Testing video, how do you think digital data was collected from the sensory electrodes over the anterior deltoid?

Bluetooth wireless transmission

How far above the basketball rim you aim the 3-point attempt depends upon______________?

time it takes the ball to get to the rim

Quantities which have both magnitude and direction are called

vectors

How was the paralyzed arm secured to the pedals on the crankarm?

velcro straps

Do our research efforts in our Lab for Wellness and Motor Behavior (LWMB) justify support from local, state, and federal agencies?

yes