26) You have been called as a forensics expert witness in a trial regarding an auto accident.The plaintiff was traveling East at 13.0 m/s when they were struck by the defendant's carwhich had been traveling North. The cars, each of mass 925 kg, stuck together and the skidmarks left on the pavement make an angle of 55.0° north of east. The plaintiff contends thatthe defendant was speeding. What was the speed of the defendant's car before the collision,and did it exceed the 35.0 mph speed limit?NPlaintiffv = 13.0 m/s(Skidmarks)55.0°Defendantv = ?

Step 1:The plaintiff was travelling eastwards with an initial velocity of 13 m/s, in a car of mass…

Answered: 26) You have been called as a forensics…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter4: The Laws Of Motion

Section: Chapter Questions

Problem 1CQ

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An iceboat is at rest on a frictionless horizontal surface.Due to the blowing wind, 4.0 s after the iceboat is released, it is movingto the right at 6.0 m/s (about 22 km/h, or 13 mi/h). What constanthorizontal force FW does the wind exert on the iceboat? The combinedmass of iceboat and rider is 200 kg.
A rocket with a mass of 1 ton is launched vertically. Its initial speed at T = 0 is 1200 km/h, its friction with the air is 200N. Find. a) Differential equation in terms of b, m and g. b) The solution of the differential equation for V. c) The value of the velocity with t= 1 min, 2 min.
The masses m1and m2shown in the figure are tied to eachother by a rope over a frictionless pulley. While the mass m1rotates in the horizontal plane, the mass m2staysat rest. Neglect the mass of the pulley and the rope. (m1= 4 kg, m2= 5 kg, L = 2 m)a) Find the tension in the rope.b) Find angle c) Find the velocity of the mass m1.
Akagi was a Japanese aircraft carrier used during World War II. The upper flight deck sloped slightly fromamidships toward the bow and toward the stern to assist landings and takeoffs for the underpowered aircraft of that time. Assumea 5 m drop from amidship to the bow. Assume the Japanese Nakajima Ki‐84 plane could takeoff in a length of about 58 m at a speedof 31 m/s. The mass of the plane is 3600 kg fully loaded with gasoline. What force is the engine required to produce for takeoff?Ifthe deck were not sloped, what force would the engines require for takeoff?
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A ball with mass 0.8 kg is thrown southward into the air with a speed of 30 m/s at an angle of 30oto the ground. A west wind applies a steady force of 4 N to the ball in an easterly direction. Where does the ball land and with whatspeed?
In a head-on collision, a car stops in 0.14 ss from a speed of 11 m/sm/s . The driver has a mass of 90 kgkg , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second?
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After falling from rest from a height of 30.0 m, a 0.500-kgball rebounds upward, reaching a height of 20.0 m. If the contactbetween ball and ground lasted 2.00 ms, what average forcewas exerted on the ball?
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For the couple in Fig. 3.28, suppose you were told that the girls mass was three-fourths that of the boys mass. What would be the girls velocity in this case?

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