The flowers of the bunchberry plant open with astonishing force and speed, causing the pollen grains to be ejected out of the flower in a mere 0.30 ms at an acceleration of 2.5×104 m/s2 .
If the acceleration is constant, what impulse is delivered to a pollen grain with a mass of 1.1×10−7 g ?
m = mass = 1.1 x 10-7 g = 1.1 x 10-10 kg
a = acceleration = 2.5 x 104 m/s2
t = time = 0.3 ms = 0.3 x 10-3 sec
F = force = ma
impulse is given as
I = F t
I = (1.1 x 10-10) (2.5 x 104 ) (0.3 x 10-3 )
I = 8.25 x 10-10
The flowers of the bunchberry plant open with astonishing force and speed, causing the pollen grains...
The flowers of the bunchberry plant open with astonishing force and speed, with pollen grains accelerating from rest to 7.5 m/s. Part A What impulse is delivered to a 1.0×10−10kg pollen grain? Express your answer with the appropriate units. J = Part B What is the average force if this impulse is delivered in 0.30 ms? Express your answer with the appropriate units. Fav = Part C Determine the ratio of that force to the weight of the pollen grain.
The bunchberry flower has the fastest-moving parts ever seen in a plant. Initially, the stamen are held by the petals in a bent position, storing elastic energy like a coiled spring. As the petals release, the tips of the stamen act like medieval catapults, flipping through a 60 ∘ angle in just 0.30 ms to launch pollen from the anther sacs at their ends. The human eye just sees a burst of pollen; careful photography(Figure 1) reveals the details. As...