Physics, 13.05.2021 17:20 BaileyElizabethRay
Magnitude of a person in a rocket sled as
braked and certainly would have been lethal to him. The ability of a woodpecker to withstand
such huge acceleration magnitudes is not well understood, but there are two main arguments.
(1) The woodpecker's motion is almost along a straight line. Some researchers believe that
concussion can occur in humans and animals when the head is rapidly rotated around the neck
(and brain stem), but that it is less likely in straight-line motion. (2) The woodpecker's brain is
attached so well to the skull that there is little residual movement or oscillation of the brain just
after the impact and no chance for the tissue connecting the skull and brain to tear.
PRACTICE PROBLEMS
6. An electric vehicle starts from rest and accelerates at a rate of 2.0 m/s in a straight line until it reaches as
then slows at a constant rate of 1.0 m/s² until it stops. (a) How much time elapses from start to stop? (b
travel from start to stop?
7. On a dry road, a car with good tires may be able to brake with a constant deceleration of 4.92 m/s?. (a
initially travelling at 24.6 m/s, take to stop? (b) How far does it travel in this time? (c) Graph x versus tand v versus t for deceleration
Answers: 2
Physics, 22.06.2019 06:30
Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults
Answers: 1
Physics, 22.06.2019 10:50
Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k
Answers: 1
Physics, 22.06.2019 16:30
Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)
Answers: 1
Physics, 22.06.2019 17:00
Explain what will happen if decomposers were apsent from a forest ecoysystem.
Answers: 1
Magnitude of a person in a rocket sled as
braked and certainly would have been lethal to him. The a...
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