itam 7 Review | Constants | Periodic Table Notioe chint enm heing o and landng Happing is an efficient method of locomotion for the kangaroo (see the Sgure above). When the kangaroo is in the air, the Earth-kangaroo system has a combination of gravitational potential energy and kinetic energy. When the kangaroo lands, its Achilles tendons and the attached muscles stretch-a fom of elastic potential energy. This elastic potential energy is used along with additional muscle tension to launch the kangaroo off the ground for the next hop. In the red kangaroa, more than 506 of the total energy used during each hop is recovered elastie potential energy. This is so efficient that the kangaroo's metabolic nte actualy decreases slightly as ts hopping speed increases from 8 km/h to 25 km/h. The horizontal and vertical force components exerted by a firm surface on a kangaroo's feet while it hops are shown in the figure The vertical force Ny an K (he figure below) varies: when the kangaroo is not touching the surface S. the force is zera; when itis puahing of the force is about three times the gravitational force that Earth exerts on the kangaroo. The surtace exerts a backward herizontal force (FanK) on the kangaroo's foot while it lands and a forward horizontal force as it pushes off for the next hop (the figure below), simiar to what happens to a human foot when landing in front of the body and when pushing off for another step when behind the body. The farce in the top point is Nar 1800 N and the mass of the kangaroo is m 60 kg. N al force whule contacting Srtae N 02 04 4. Part A Estimate the vertcal impulse due to the gravitational force exerted on the kangaroo by Earth during Be ahot menterval whle it takes of Enter Express your answer with the appropriate units. ted upwards and a negative value the impulse is directed downward -58.8 N m Submin Eevi Answers Reust Answer
itam 7 Review | Constants | Periodic Table Notioe chint enm heing o and landng Happing is an efficient method of locomotion for the kangaroo (see the Sgure above). When the kangaroo is in the air, the Earth-kangaroo system has a combination of gravitational potential energy and kinetic energy. When the kangaroo lands, its Achilles tendons and the attached muscles stretch-a fom of elastic potential energy. This elastic potential energy is used along with additional muscle tension to launch the kangaroo off the ground for the next hop. In the red kangaroa, more than 506 of the total energy used during each hop is recovered elastie potential energy. This is so efficient that the kangaroo's metabolic nte actualy decreases slightly as ts hopping speed increases from 8 km/h to 25 km/h. The horizontal and vertical force components exerted by a firm surface on a kangaroo's feet while it hops are shown in the figure The vertical force Ny an K (he figure below) varies: when the kangaroo is not touching the surface S. the force is zera; when itis puahing of the force is about three times the gravitational force that Earth exerts on the kangaroo. The surtace exerts a backward herizontal force (FanK) on the kangaroo's foot while it lands and a forward horizontal force as it pushes off for the next hop (the figure below), simiar to what happens to a human foot when landing in front of the body and when pushing off for another step when behind the body. The farce in the top point is Nar 1800 N and the mass of the kangaroo is m 60 kg. N al force whule contacting Srtae N 02 04 4. Part A Estimate the vertcal impulse due to the gravitational force exerted on the kangaroo by Earth during Be ahot menterval whle it takes of Enter Express your answer with the appropriate units. ted upwards and a negative value the impulse is directed downward -58.8 N m Submin Eevi Answers Reust Answer
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Transcribed Image Text:similar to what happens o a human foot when landing in front of the body and when pushing off for another step when behind the body. The force in the top point is N - 1800 nd a forward horizontal force as it pushes off for the next hop (the figure below),
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Review| Constants | Periodic Table
Notice cha t en whes king ol and landing
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attached muscles stretch-a fom of elastic potential energy. This elastic potential energy is used along with additional muscle tension to launch the kangaroo of the ground for the next hop. In the red kangaroa, more than 506 of the total energy used during esch hop is
recovered elastie potential energy. This is so efficient that the kangaroo's metabclic nte actualy decreases slightly as ts hopping speed inereases from 8 km/h to 25 km/h.
The horizontal and vertical force ecomponents exerted by a firm surface on a kangaroos feet while it heps are shown in the figure The vertical force Ny an K (the figure below) varies: when the kangaros is not touching the surface S, the force is zera; when it is pushing oft
the force is about three times the gravitational force that Earth exerts on the kangaroo. The surtace exerts a backward herizontal force (Fs an K) on the kangaroo's foot while it lands
n efficient method of locomation for the kangaroo (see the figure above). When the kangaroo is in the air, the Earth-kangaroo system has a combination of gravitational potential energy and kinetic energy. When the kangaroo lands, its Achiles tendons ands
N and the mass of the kangaroo is m 60 kg.
dcal forct
while contacting
urface
N
Part A
Estimate the vertical impulse due to the gravitational force exerted on the kangaroo by Earth during Be ahot uminterval whle it takes of
Express your answer with the appropriate units.
rected upwards and a negaive value if the impulse is directed downward.
?
58.8
N m
Submik
Erevis Answers Remurst Answer
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