Answered

Welcome to Westonci.ca, the place where your questions are answered by a community of knowledgeable contributors. Join our Q&A platform to connect with experts dedicated to providing accurate answers to your questions in various fields. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform.

basilisk lizards can run across the top of a water surface (fig. 9-52). with each step, a lizard first slaps its foot against the water and then pushes it down into the water rapidly enough to form an air cavity around the top of the foot. to avoid having to pull the foot back up against water drag in order to complete the step, the lizard withdraws the foot before the water can flow into the air cavity. if the lizard is not to sink, the average upward impulse on the lizard during this full action of slap, downward push, and withdrawal must match the downward impulse due to the gravitational force. suppose the mass of a basilisk lizard is 90.0 g, the mass of each foot is 2.53 g, the speed of a foot as it slaps the water is 1.08 m/s, and the time for a single step is 0.417 s. (a) what is the magnitude of the impulse on the lizard during the slap? (assume this impulse is directly upward.) (b) during the 0.417 s duration of a step, what is the downward impulse on the lizard due to the gravitational force? (clearly the push, not the slap, provides the primary support for the lizard.)

Sagot :

The magnitude of impulse acting directly upwards during the slap is -0.00273 N.s.

The magnitude of the impulse that is downward on the lizard due to the gravitational force is 0.375 kg.m/s.

Given that, mass of the basilisk lizard = 90 g = 90/1000 kg = 0.09 kg

Mass of each foot = 2.53 g = 0.00253 kg

Vf = 0

Vi = 1.08 m/s

Time taken for a single step is 0.417 s

I = Δp = Mf * (Vf - Vi ) = 0.00253* (0 - 1.08) = -0.00273 N.s

On each step, the basilisk lizard must provide an upward force that counters its weight which is equal to W= mg.

We know the formula for impulse acting downwards is, I = F Δt

It can also be written as I = W Δt = Ml* g Δt

Substituting the values in the above formula,

Ml*g Δt = 0.09* 10* 0.417 = 0.375 kgm/s

To know more about impulse:

https://brainly.com/question/13651603

#SPJ4

We appreciate your visit. Hopefully, the answers you found were beneficial. Don't hesitate to come back for more information. We hope you found this helpful. Feel free to come back anytime for more accurate answers and updated information. Keep exploring Westonci.ca for more insightful answers to your questions. We're here to help.