Basilisk lizards can run across the top of a water surface. Witheach step, a lizard first slaps its foot against the water and thenpushes it down into the water rapidly enough to form an air cavityaround the top of the foot. To avoid having to pull the foot backup against water drag in order to complete the step, the lizardwithdraws the foot before the water can flow into the air cavity.If the lizard is not to sink, the average upward impulse on thelizard during this full action of slap, downward push andwithdrawal must match the downward impulse due to the gravitationalforce. In ansewring the following questions you may assume that themass of the basilisk is 90g, the mass of each foot is 3g, the speedof a foot as it slaps the water is 1.5 m/s, and the time for asingle step is 0.6 s.
a) what is the magnitude of the impulse on the lizard during theslap? Assume that the impulse is directed upwards.
b)during the 0.6 s duration ofthe step, what is the downwardimpulse on the lizard due to gravitational force?
c) which action, the slap or push, provides the primary support forthe lizard, or are they approximately equal in their support?
Basilisk lizards can run across the top of a water surface. Witheach step, a lizard first slaps its foot against the water and thenpushes it down into the water rapidly enough to form an air cavityaround the top of the foot. To avoid having to pull the foot backup against water drag in order to complete the step, the lizardwithdraws the foot before the water can flow into the air cavity.If the lizard is not to sink, the average upward impulse on thelizard during this full action of slap, downward push andwithdrawal must match the downward impulse due to the gravitationalforce. In ansewring the following questions you may assume that themass of the basilisk is 90g, the mass of each foot is 3g, the speedof a foot as it slaps the water is 1.5 m/s, and the time for asingle step is 0.6 s.
a) what is the magnitude of the impulse on the lizard during theslap? Assume that the impulse is directed upwards.
b)during the 0.6 s duration ofthe step, what is the downwardimpulse on the lizard due to gravitational force?
c) which action, the slap or push, provides the primary support forthe lizard, or are they approximately equal in their support?
