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
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.
A runner gains kinetic energy as they get faster. This is the energy associated with their motion and speed.
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.
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.
The runner is maintaining a steady speed and covering equal distances in equal time intervals.
The runner is running at a speed of 8 miles per hour.
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.
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.
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.
The speed of light is minimum in Glass. It is because light travels at minimum speed in solids.
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.
A projectile has minimum speed at the top of the trajectory.
their speed
Assuming the runner maintains his average speed for an hour, 3 kilometres in 30 minutes is equal to 6 kilometres per hour.
The answer depends on the distance for the race. A marathon runner could not maintain the speed attained by a sprint runner.
The answer depends on the distance for the race. A marathon runner could not maintain the speed attained by a sprint runner.
After running for a while, the runner will usually get tired, and tend to run slower.