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Suppose the net vertical impulse on the 50-kg kangaroo due to all external forces was +100 N- s. Find its vertical component of velocity when it leaves the ground. Assume that the kangaroo is initiaily at rest. Exprese MOU

Suppose the net vertical impulse on the 50-kg kangaroo due to all external forces was +100 N- s. Find its vertical component of velocity when it leaves the ground. Assume that the kangaroo is initiaily at rest. Exprese MOU

University Physics Volume 1
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter8: Potential Energy And Conservation Of Energy
Section: Chapter Questions
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it ericalatwen aking ef und lan Höpping is an efficient method of locomotion for the kagaroo (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 Achilles tendons and the attached muscles stretch-a form 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 kangaroo, more than 50% of the total energy used during each hop is recovered elastic potential energy. This is so efficient that the kangaroo's metabolic rate actually decreases slightly as its hopping speed increases from 8 km/h to 25 km/h. The horizontal and vertical force components exerted by a fırm surface on a kangaroo's teet while it hops are shown in the fiqure below. The vertical force Ns on Ky vanes: when the kangaroo is not touching the surface S the force is zero, when it is pushing off, the force is about three times the gravitational force that Earth exerts on the kangaroo, The surtace exerts a backward horizontal force (F ) on the kangaroo's foot while it lands and a fonward horizontal force as it pushes off for the next hop similar to what happens to a human foot when landing in tront of the body and when pushing off for another step when behind the body. (c) F 1500 N TO00 500 500
Transcribed Image Text:it ericalatwen aking ef und lan Höpping is an efficient method of locomotion for the kagaroo (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 Achilles tendons and the attached muscles stretch-a form 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 kangaroo, more than 50% of the total energy used during each hop is recovered elastic potential energy. This is so efficient that the kangaroo's metabolic rate actually decreases slightly as its hopping speed increases from 8 km/h to 25 km/h. The horizontal and vertical force components exerted by a fırm surface on a kangaroo's teet while it hops are shown in the fiqure below. The vertical force Ns on Ky vanes: when the kangaroo is not touching the surface S the force is zero, when it is pushing off, the force is about three times the gravitational force that Earth exerts on the kangaroo, The surtace exerts a backward horizontal force (F ) on the kangaroo's foot while it lands and a fonward horizontal force as it pushes off for the next hop similar to what happens to a human foot when landing in tront of the body and when pushing off for another step when behind the body. (c) F 1500 N TO00 500 500
(b) Nky 1500 Pushing forward when taking off 1000 0.4 6) -Pushing back when landing Fsak 92 500 0.2 0.4 500 Feky Y Part A Suppose the net vertical impulse on the 50-kg kangaroo due to all external forces was +100 N- s. Find its vertical component of velocity when it leaves the ground. Assume that the kangaroo is initially at rest. Express your answer with the appropriate units. Av = Value Units
Transcribed Image Text:(b) Nky 1500 Pushing forward when taking off 1000 0.4 6) -Pushing back when landing Fsak 92 500 0.2 0.4 500 Feky Y Part A Suppose the net vertical impulse on the 50-kg kangaroo due to all external forces was +100 N- s. Find its vertical component of velocity when it leaves the ground. Assume that the kangaroo is initially at rest. Express your answer with the appropriate units. Av = Value Units
Expert Solution
Step 1

Given information:

The mass of the kangaroo (m) = 50 k

The net vertical Impulse (Pnet) = +100 N.s

The initial velocity of the kangaroo (u) = 0 m/s

The vertical velocity of the kangaroo when it leaves the ground (v) = ?

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