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The bunchberry flower has the fastest moving parts ever seenin a plant. Initially the stamens are held by the petals in abent position storing elastic energy liked a coiled spring. As the petals release the tips of the stamens act like medievalcatapults flipping through a 60 degree angle in just .30 ms tolaunch pollen from the anther sacs at their ends. We canmodel a stamen tip as a 1 mm long 10 ?g rigid rod with a 10?g anther sac at one end and a pivot point at the oppositeend. Assuming that the angular acceleration is constantthroughtout the motion
a) what is the trangential acceleration of the anther sacduring the motion
b) what is the speed of the anther sac as it relases itspollen
c)How large is the straightening torque? neglect gravitationalforces
d) compute the gravitational torque on the stamen tip(including the anther sac) in its initial orientation. was itreasonable to neglect the gravitational torque in part c?
27 g of copper pellets are removed from a 300 C oven and immediately dropped into 120 mL of water at 21C in an insulated cup. What will the new water temperature be?
189.35 J of energy are transferred to a system in the form of heat while the internal energy decreases by 46.99 J
At t = 5.0 seconds, the cheetah is standing still, having knocked over the gazelle. Illustrate what is the average acceleration of the cheetah from t = 0 to t = 5.0 seconds?
A ball rolling along at speed v without slipping on a horizontal surface while it comes to a hill that rises at a constant angle above the horizontal.
When the afternoon Sun reaches an angle of 27.0° above the horizon, sunlight ceases to illuminate the bottom of the tank. Evaluate how deep is the tank?
David is driving a steady 25 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.8 m/s^2 at the instant when David passes.
A car starts from rest and then accelerates uniformly to a linear speed of 16 m/s in 42 s. If the tires have a radius of 27 cm, what are the following.
Two rockets having the same acceleration start from rest, but rocket A travels for twice as much time as rocket B, If rocket A reaches a speed of 390m/s , what speed will rocket B reach
A bomb at rest at the origin of an xy-coordinate system explodes into three pieces. Just after the explosion, one piece, of mass 2.0 kg, what is the magnitude of the velocity of the third piece
A bullet leaves a standard 45-caliber pistol (5.0-in. barrel) at a speed of 262 m/s. If it takes 1 ms to traverse the barrel, determine the average acceleration experienced by the 16.2-g bullet within the gun and after that compute average force e..
What hormones are hypersecreted causing hyperglycemia and hypertension? What is the cause and what physical factor allow to rule out thyroid problem.
When subject to a steady acceleration of 0.800 g, the object must be located 0.600cm from its equilibrium position. Find the force constant required for the spring.
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