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Consider the record throws for the javelin, men 98.48 m (Zelezny, 1996, 0.800 kg) and women 72.28 m (Spotakova, 2008, 0.600 kg); discus, men 74.08 m (Schult, 1986, 2.00 kg) and women 76.80 m (Rensch, 1989, 1.00 kg); and shotput, men 23.12 m (Barnes, 1990, 7.26 kg) and women 22.63 m (Lisovskaya, 1987, 4.00 kg). (a) Find the minimum initial kinetic energies for the six throws. (b) For which events does air resistance apparently play the largest and smallest roles?
Each cable has a length of l = 2.90 m. Illustrate what is the tension T in each of the cables? Use 9.80 m/s2 for the magnitude of theacceleration due to gravity.
two blocks are sliding along a frictionless track. block a mass 4.17 kg is moving to the right at 1.60 ms. block b mass
Two astronauts floating at rest with respect to their ship in space decide to play catch with a3-kg asteroid. What is Joe's speed right after his first catch
a force of 40.0 n is required to start a 5.0-kg. box moving across a horizontal concrete floor.a what is the
a block is at rest on an inclined plane whose elevation can be varied. the coefficient of static friction is ms 0.42
tarzan is curled in a ball and is swinging on rope trying to get to next tree. he is unable to make it to next tree and
The technique known as potassium-argon dating is used to date old lava flows and thus any fossilized skeletons found in them, What is the age of a piece of solidified lava
The Large Hadron Collider, or LHC, to be completed later this year, accelerates protons around a nearly circular track of circumference 26.66 km to a momentum of up to 3.74e-15 kg m/s, For the same magnetic field as in part (a), what is the momentu..
Find the net gravitational force on each mass in terms of R and M. The first object has a mass of 2M and is located at (0,0). The second object has a mass M and is located at (0,R). The third has a mass of 2M and is located at (R,R). The last object ..
A sample of an unknown substance appears to weigh 15.1 N in air and 9.18 N when immersed in a solvent with density 0.945 g/mL. Find the density of the sample
An optometrist has a choice to give a patient either regular glasses or contact lenses to correct nearsightedness. Usually, regular glasses sit a few centimeters in front of the eye and contact lenses right on the eye. What do you think, the power..
A baseball has a velocity of 41.5 m/s (92.8 mi/h), directed horizontally, as it is released by a pitcher. Calculate the ball's instantaneous acceleration just before it is released
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