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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)Determine the magnitude and direction of the electric field at a point 7.8 meters from this charge B) How far from this charge does the electric field have a magnitude of 2 N/C
why circular orbit of the particle encloses a magnetic flux.
In an ice show a 45.0 kg skater leaps into the air and is caught by an initially stationary 85.0kg skater. What is their final velocity assuming negligible friction and that the leaper's original horizontal velocity was 4.00 m/s
A satellite has a mass of 95 kg and is located at 1.99 106 m above the surface of Earth. What is the magnitude of the gravitational force on the satellite
An aircraft weighing 892 N is accelerated at 9.9 m/s/s for 5 seconds, What is the force required to launch the aircraft
a mass m is attached to a string of length l and released when the string is horizontal, causing the mass to fall in a circular path. determine the maximum value of the tension force in the string
An archer shoots an arrow toward a 300-g target that is sliding in her direction at a speed of 2.20 m/s on a smooth, What is the speed of the arrow after passing through the target
The pressure exerted by a phonograph needle on a record is surprisingly large. what pressure is exerted on the record in N/m2
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 3.45 × 10-11 m. Determine the magnitude..
A microwave oven of mass 12.5kg is pushed a distance 8.00m up the sloping surface of a loading ramp inclined at an angle of 36.2? above the horizontal, What is the work done on the oven by the force
q1. a weight with a mass of 57 kg is suspended from a point near the right hand end of a uniform boom with a mass of 60
A counter with negligible background gives exactly 10,000 counts in a 1-s period when a standard source is in place. What is the counter dead time
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