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During a crash test, a car moving at 60 km/ hr collides with a rigid barrier and comes to a complete stop in 200 ms. The collision force as a function of time is given by F=at^{4} +bt^{3} +ct^{2} +dt, where a = -8.86 GN/ s^4 , b = 3.27 GN}/ s^3 , -360MN/ s^2 , and 12.7MN/s.
A) Find the total impulse imparted by the collision.B) Find the average collisional force.C) Find the car's mass.
David is driving a steady 28.0m/s while he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant when David passes. How far does Tina drive before passing David.
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A parachutist and her parachuting equipment have the combined mass of 121 kg. Her terminal velocity is 5.30 m/s with the parachute open. Her parachute has a cross-sectional area of 35.80 m^2. The density of air at that altitude is 1.23kg/m^3. What is..
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pipe open at one end only has a fundamental frequency of 237 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end. Currently, when both pipes vibrate at their fundamental frequencies, a beat ..
A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits other kid 2.4 away squares in the back, at a point 0.85 above the ground. What was the initial speed of the water.
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