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Question: Why do gymnasts use floor mats that are very thick?
Why does a baseball catcher's mitt have more padding than a conventional glove?
You have a friend who says that after a golf ball collides with a bowling ball at rest, although the speed gained by the bowling ball is very small, its momentum exceeds the initial momentum of the golf ball. Your friend further asserts this is related to the "negative" momentum of the golf ball after collision. Another friend says this is hogwash-that momentum conservation would be violated. Which friend do you agree with?
Explain how "elastic potential energy" dramatically changed the sport of pole vaulting when flexible fiberglass poles replaced stiffer wooden poles.
Suppose that you and two classmates are discussing the design of a roller coaster. One classmate says that each summit must be lower than the previous one. Your other classmate says this is nonsense, for as long as the first one is the highest, it doesn't matter what height the others are. What do you say?
An inefficient machine is said to "waste energy." Does this mean that energy is actually lost? Explain.
Please answer each question in at least 500 words
For no apparent reason, a poodle is running at a constant speed of 6.00 m/s in a circle with radius 2.9 m. Let v1 be the velocity vector at time t1 , and let V2 be the velocity vector at time t2 . Consider (change in v)=v2-v1 and (change in t)=t2-..
A base ball is vertically tossed up from the top of a hill with a velocity of 3 m/s. Determine the height of the hill
A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 15.0 m/s due north relative to the water. Illustrate what is the velocity of the boat relative to shore?
q1. an elevator cable can withstand a maximum tension of 19500n before breaking. the elevator has a mass of 480 kg and
A charge of 27.0 nC is placed in a uniform electric field that is directed vertically upward and that has a magnitude of 4.00×104N/C . What work is done by the electric force when the charge moves
To determine the specific heat capacity of lead, you get 500g of lead shot to 100 degrees C and place it in an aluminum calorimeter of mass 250g, what is the specific heat of lead
a 3.000 u 1 u 931.5 mevc2 object moving to the right through a laboratory at 0.8c collides with a 4.000 u object
How many kilograms of coal must be burned to produce the same energy as 1.5 kg of 235 92 U (235 on top, 92 on bottom)?
The 1D2 state of atomic oxygen lies 1.968 eV above the ground state. Calculate the enthalpies of reaction for the HOx cycle reaction 1DO + H2O r 2OH and the corresponding ground state reaction 3PO + H2O→ 2OH.
the potential at location a is 419 v. a positively charged particle is released there from rest and arrives at location
Determine the distance y' to the centroid for the shaded area measured from the x axis if a is 2.7 in. Determine the moment of inertia Ix for the shaded area about the x axis if a is 2.9 in
A 3.50-kg ball, moving to the right at a velocity of +2.72 m/s on a frictionless table, Find the magnitude and direction of the final velocity of the two balls if the collision is completely inelastic
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