Basidiomycete fungi ballistically eject millions of spores into the air by releasing the surface tension energy of a water droplet condensing on the spore. The spores are ejected with typical speeds of 1.05 m/s, allowing them to clear the "boundary layer" of still air near the ground to be carried away and dispersed by winds. (a) If a given spore is accelerated from rest to 1.05 m/s in 7.35 µs, what is the magnitude of the constant acceleration of the spore (in m/s?) while being ejected? 1.46*10**-5 Which of the kinematic equations relates velocity, acceleration, and time? Did you plug in all the numerical values in SI units? m/s? (b) Find the maximum height of the spore (in cm) if it is ejected vertically. Ignore air resistance and assume that the spore is ejected at ground level. 5.35 Check your equation again carefully. Which equation relates velocity, displacement, and acceleration? Is the equation linear in velocity? cm (c) Find the maximum horizontal range of the spore (in cm) if it is ejected at an angle to the ground. Ianore air resistance
Basidiomycete fungi ballistically eject millions of spores into the air by releasing the surface tension energy of a water droplet condensing on the spore. The spores are ejected with typical speeds of 1.05 m/s, allowing them to clear the "boundary layer" of still air near the ground to be carried away and dispersed by winds. (a) If a given spore is accelerated from rest to 1.05 m/s in 7.35 µs, what is the magnitude of the constant acceleration of the spore (in m/s?) while being ejected? 1.46*10**-5 Which of the kinematic equations relates velocity, acceleration, and time? Did you plug in all the numerical values in SI units? m/s? (b) Find the maximum height of the spore (in cm) if it is ejected vertically. Ignore air resistance and assume that the spore is ejected at ground level. 5.35 Check your equation again carefully. Which equation relates velocity, displacement, and acceleration? Is the equation linear in velocity? cm (c) Find the maximum horizontal range of the spore (in cm) if it is ejected at an angle to the ground. Ianore air resistance
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Transcribed Image Text:Basidiomycete fungi ballistically eject millions of spores into the air by releasing the surface tension energy of a water droplet
condensing on the spore. The spores are ejected with typical speeds of 1.05 m/s, allowing them to clear the "boundary layer"
of still air near the ground to be carried away and dispersed by winds.
(a) If a given spore is accelerated from rest to 1.05 m/s in 7.35 µs, what is the magnitude of the constant acceleration of
the spore (in m/s?) while being ejected?
1.46*10**-5
Which of the kinematic equations relates velocity, acceleration, and time? Did you plug in all the numerical values in SI
units? m/s?
(b) Find the maximum height of the spore (in cm) if it is ejected vertically. Ignore air resistance and assume that the spore
is ejected at ground level.
5.35
Check your equation again carefully. Which equation relates velocity, displacement, and acceleration? Is the equation
linear in velocity? cm
(c) Find the maximum horizontal range of the spore (in cm) if it is ejected at an angle to the ground. Ignore air resistance
and assume that the spore is ejected at ground level.
10
How is horizontal range calculated for a projectile that is launched on level ground? What is the angle for which
maximum range is obtained? cm
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