A small car passes over a hill (s) with the shape (JS ) of a circle whose radius is 20 m. The total mass of the (car + passengers (S) is 400 kg. At the top of the hill, the car has a speed of 10 m/s. The force (in kN) of the road on the car at this position is: A. 3.9, up B. 3.9, down C. 1.9, up D. 1.9, down E. 2.4, up

A small car passes over a hill (s) with the shape (JS ) of a circle whose radius is 20 m. The total mass of the (car + passengers (S) is 400 kg. At the top of the hill, the car has a speed of 10 m/s. The force (in kN) of the road on the car at this position is: A. 3.9, up B. 3.9, down C. 1.9, up D. 1.9, down E. 2.4, up

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter13: Gravitation

Section: Chapter Questions

Problem 13.6CYU: Check Your Understanding By what factor must the radius change to reduce the orbital velocity of a...

See similar textbooks

Similar questions

. A device for training astronauts and jet fighter pilots isdesigned to move the trainee in a horizontal circle ofradius 11.0 m. If the force felt by the trainee is 7.45 timesher own weight, how fast is she revolving? Express youranswer in both m/s and rev/s ?
A ball of mass m = 0.275 kg swings in a vertical circular path on a string L= 0.850 m long as shown in the figure. If its speed is 5.20 m/s at the top of the circle, what is the tension in the string there?
One end of a cord is fixed and a small 0.550-kg object is attached to the other end, where it swings in a section of a vertical circle of radius 1.50 m, as shown in the figure below. When ? = 17.0°, the speed of the object is 6.00 m/s. At this instant, find the magnitude of the tension in the string.
A horizontal force of 310 N , is exerted on a 2.5 kg ball as it rotates ( at arm's length ) uniformly in a horizontal circle of radius 0.90 m , calculate the speed (v) of the ball
A typical hard disk in a desktop computer is a uniformly solid, 400 gram disk 3.5 inches in diameter, and takes 70 milliseconds to spin from rest up to a frequency of 7200 revolutions per minute (r.p.m.). Problem 2.4. How many revolutions does the disk go through during this spin-up process? Problem 2.5. Which is bigger, the centripetal force felt by a dust particle stuck to the edge of the disk halfway through its spin-up or the centripetal force felt by an identical dust particle stuck halfway to the edge of the disk when it’s at full speed?
A 7200-pound vehicle is driven at a speed of 25 miles per hour on a circular interchange of radius 150 feet. To keep the vehicle from skidding off course, what frictional force must the road surface exert on the tires?
The weight of a particle varies with altitude such that ? = m(gro2)/r2, where ?0 is the radius of the earth and ? is the distance from the particle to the earth’s center. If the particle is fired vertically with a velocity ?0 rom the earth’s surface, determine its velocity as a function of position ?. What is the smallest velocity ?0 required to escape the earth’s gravitational field, what is the time required to reach the altitude? Show complete Solution and the FBD
If a 1,000-kg car is traveling at 20.0 m/s when it reaches the bottom of a circular hill of radius 8.00 m, what normal force does the road exert on the car at the bottom of the hill?
A jet pilot takes his aircraft in a vertical loop , if the jet is moving at a speed of 1140 km/m , at the lowest point of the loop , determine the minimum radius (r) of the circle , so that the centripetal acceleration at the lowest point doesn't exceed 6.4 g's and also calculate the 70 kg pilot's effective weight ( The force with which the seat pushes up on him ) at the bottom of the circle , and at the top of the circle ( assume the same speed ) FNbottom , FNtop ?
A pail of water can be whirled in a vertical circular path suchthat no water is spilled. Why does the water remain in the pail,even when the pail is upside down above your head?
Hungarian Adrian Annus won the gold medal for thehammer throw at the 2004 Olympics in Athens with a winningdistance of 83.19 meters.* The event consists of swinging a16-pound weight attached to a wire 190 centimeters long ina circle and then releasing it. Assuming his release is at a 45°angle to the ground, the hammer will travel a distance ofv02/gmeters, where g = 9.8 meters/second2and v0 is the linearspeed of the hammer when released. At what rate (rpm) washe swinging the hammer upon release?
A fire acrobat is swinging a fireball attached to a 61m string in a vertical circle. If the fireball has a constant speed of 9.75m/s and the tension in the string is 11N when it is on the bottom of thr circle, what is the mass of the fireball?