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Problems with solutions

I.D Level Problem Problem Topic
318 High school If you can build a roller coaster to demonstrate acceleration can you build one in which the rider feels a lot of acceleration ? explain ? . . . continues
Solution:
The maximum acceleration one can experience is the acceleration due to gravity in a roller coaster . The car fall downwards due to gravity and gain kinetic energy . Thus the roller coaster can demonstrate maximum acceleration = g = 9.8 m/s^2 .
Kinematics
319 High school If you add 2m/s to a cars starting speed would it increase the final speed by 2m/s ? should it ? explalin ? . . . continues
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Kinematics
320 High school How much faster is a cars final speed if you double the gravitational acceleration ? . . . continues
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Kinematics
321 High school An express subway train passes through an underground station . It enters with an initial velocity of 22.0 m/s and decelerates at a rate of 0.150 m/s^2 as it goes through . The station is 210m long .

a) If the train is 130 m long , when does the end of the train leaves the station ?

b) What is the velocity of the end of the train as . . . continues
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Kinematics
322 High school A basketball referee tosses the ball straight up for the starting tip off. At what velocity must a basketball player leave the ground to rise 1.25 m above the floor in an attempt to get the ball ? . . . continues
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Kinematics
323 High school A swimmer bounces straight up from a diving board and falls feet first into a pool . She starts with a velocity of 4.0 m/s and her takeoff point is 1.80m above the pool . What is her velocity when her feet hit the water ? . . . continues
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Kinematics
324 High school Calculate the height of a cliff if it takes 2.35 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.0 m/s . How long would it take to reach the ground if it is thrown straight down with the same speed . . . . continues
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Kinematics
326 High school A 5 lb weight suspended from a 3 ft cord is pulled to one side by a horizontal force F , so that the cord makes an angle of 30 degrees with the vertical . What is the value of the force F , and what is the value of T , the tension of the cord ? . . . continues
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Force & Laws of Motion
327 High school A 1200 lb sled is pulled along a horizontal surface at uniform speed by means of a rope that makes an angle of 30 degrees above the horizontal . If the tension, T , in the rope is 100 lbs , what is the coefficient of friction ? . . . continues
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Force & Laws of Motion
328 High school A 70 gram body is projected up a rough incline plane, inclined at an angle of 35 degrees to the horizontal, with an initial velocity of 400 cm/sec . The coefficient of friction between the body and the plane is ½ . How far up the plane will the body go ? . . . continues
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Force & Laws of Motion
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