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An amusement park roller coaster starts out on a level track 50.0 m long and then goes down a 50.0-meter incline at an angle of 30° to the vertical. It then goes up a 20.0-meter ramp with an incline of 20° to the horizontal. (a) What is the magnitude and direction of the displacement vector from the initial location to the bottom of the 20.0-meter ramp? (b) If it takes 20.0 s to go from the initial location to the bottom of the 20.0-meter ramp, what is the average velocity dur-ing that time? After the 20.0-meter ramp the coaster travels 15.0 m on flat ground then enters, from the bottom, the inside of a circular track of radius r. After subtending (traveling) 25.0 º around and up the circular track it is noticed that the coaster is half way up to its original height in reference to its lowest position. (c) What is the radius of the circular track? Extra-credit: if the initial speed of the coaster is 5 m/s how long does it take to reach the bottom of the circular track?
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 10 A, and that of the vacuum cleaner is 5.0 A, Determine the power consumed by the blow-dryer
A car is traveling at 61.6 km/hr on a flat, concrete highway. If the brakes are applied such that skidding occurs, the kinetic coefficient of friction between the road and tires is 0.802. If anti-lock brakes are properly applied then no skidding o..
Find density of the object
A 1.20 kg mass on a horizontal spring oscillates on a frictionless surface with a displacement as a function of time given by x(t) = 0.075cos(4.16t â€" 2.45). Find the total energy of the oscillating spring
q1. a 220 g block is attached to a horizontal spring and executes simple harmonic motion with a period of 0.150 s. if
What is the terminal speed of a 5.6 kg spherical ball with a radius of 3.0 cm and a drag coefficient of 1.55? The density of the air through which the ball falls is 1.2 kg/m3
even as Jo moves off in the opposite direction at a speed of 1.27m/s. assuming that friction is negligible, find out Al's mass.
A 95 long train begins uniform acceleration from rest. The front of the train has a speed of 25 while it passes a railway worker who is standing 170 from where the front of train started. What will be the speed of the last car as it passes the wor..
Polymer diffusion and Calibration of an optical tweezer
A ball bearing rolls along a smooth horizontal tabletop, and crashes head-on into a second ball bearing of half its mass. find the velocity of the first ball bearing after the collision
You wind up and throw a 10 kg medicine ball horizontally with a speed of 1.3 m/s directly at your 24-kg little brother. find the common speed of the ball-brother composite
How fast will the electron be moving. What was his average speed (in m/s) for the race.
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