Physics, 24.06.2020 22:01 aaqa3735

Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1,000 m/s2 lasting for at least 1 ms will cause injury. Suppose a small child rolls off a bed that is 0.49 m above the floor. If the floor is hardwood, the child's head is brought to rest in approximately 1.7 mm. If the floor is carpeted, this stopping distance is increased to about 1.4 cm. Calculate the magnitude and duration of the deceleration in both cases, to determine the risk of injury. Assume the child remains horizontal during the fall to the floor. Note that a more complicated fall could result in a head velocity greater or less than the speed you calculate. hardwood floor magnitude 2833.33 Correct: Your answer is correct. m/s2 hardwood floor duration 1.23 Incorrect: Your answer is incorrect. Your response differs from the correct answer by more than 10%. Double check your calculations. ms carpeted floor magnitude 227.98 Incorrect: Your answer is incorrect. Your response differs from the correct answer by more than 10%. Double check your calculations. m/s2 carpeted floor duration ms

Answers: 3

Show answers

Another question on Physics

Physics, 22.06.2019 06:30

From 0 to 5 seconds john pushed a box 5 meters. from 5 to 10 seconds, paul pushed the same box another 5 meters. who did more work? a. john b. paul c. john and paul did the same amount of work.

Answers: 1

Answer

Physics, 22.06.2019 08:00

What is the rate of change in a objects position?

Answers: 1

Answer

Physics, 22.06.2019 10:30

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

Answers: 1

Answer

Physics, 22.06.2019 17:10

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

Answers: 2

Answer

You know the right answer?

Traumatic brain injury such as concussion results when the head undergoes a very large acceleration....

Questions