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Assume that a 50-kg runner trips and falls with his extended hand into a wall (without
slowing down). If the bones of his two arms absorb all the forward kinetic energy, what is the
minimum speed of the runner that will cause a fracture of the arms? Assume that the length of
one arm is 1 m and that the area of each bone is 4 cm2
, on average.
aB = 16x107
Pa for the arm
a = F/A = (1.33 × 104
N) / (2.4 x 10^-4
m2
) = 5.5 x 107
Pa
What else can I help you with?
What equipment to used to find the speed of a runner?
To find the speed of a runner, you can use a stopwatch to time how long it takes the runner to cover a set distance, such as a track or a specific stretch of a road. You can then calculate the speed by dividing the distance by the time taken. Another option is to use a speed radar gun, which measures the speed of the runner as they move.
What type of energy does a runner gain when they get faster?
A runner gains kinetic energy as they get faster. This is the energy associated with their motion and speed.
How is acceleration involved in running?
Acceleration is involved in running as it refers to the rate at which a runner increases their speed over time. When a runner starts a race, they accelerate to reach their maximum speed. Acceleration is also important when a runner needs to change their speed or direction quickly during a race.
What is the speed of an average human runner?
The average speed of a human runner is around 8-10 miles per hour for a comfortable jogging pace, while sprint speeds can reach up to 25 miles per hour.
What is the best to say about a runner who is running at a constant velocity?
The runner is maintaining a steady speed and covering equal distances in equal time intervals.
At what speed is the runner running?
The runner is running at a speed of 8 miles per hour.
What is the minimum speed of a Boeing 767?
The minimum speed of a Boeing 767 to remain in flight is about 160 miles per hour. Anything below that will cause the aircraft to begin to stall.
What is the purpose of minimum speed limit laws?
The purpose of minimum speed limit laws is to keep traffic flowing smoothly on freeways. A very slow vehicle on a freeway can cause a traffic bottleneck.
What equipment to used to find the speed of a runner?
To find the speed of a runner, you can use a stopwatch to time how long it takes the runner to cover a set distance, such as a track or a specific stretch of a road. You can then calculate the speed by dividing the distance by the time taken. Another option is to use a speed radar gun, which measures the speed of the runner as they move.
Where will be speed of light minimum-water or air or vacuum or glass?
The speed of light is minimum in Glass. It is because light travels at minimum speed in solids.
Who would win a race between a runner with more speed or a runner with more stamina?
Depends. Is it a distance run? Or a fast run? If it is distance, the stamina runner would win. If it was a track, then the speed runner would win.
At what part of the trajectory does a projectile have minimum speed?
A projectile has minimum speed at the top of the trajectory.
What are the same about a road runner and a cheetah?
their speed
A runner travels 3 kilometers in 30 minutes. What is the speed of the runner?
Assuming the runner maintains his average speed for an hour, 3 kilometres in 30 minutes is equal to 6 kilometres per hour.
How many mph does a olympic runner go?
The answer depends on the distance for the race. A marathon runner could not maintain the speed attained by a sprint runner.
How many mph is the average runner going?
The answer depends on the distance for the race. A marathon runner could not maintain the speed attained by a sprint runner.
How is the time affects the speed of a runner?
After running for a while, the runner will usually get tired, and tend to run slower.
