A child sitting 1.30 m from the center of a merry-go- around moves with a speed of 1.40 m/s. Part A Calculate the centripetal acceleration of the child. a = Submit ▾ Part B 15. ΑΣΦ F = Request Answer Calculate the net horizontal force exerted on the child (m = 21.0 kg). 15. ΑΣΦ ? we m/s² ? N

A child sitting 1.30 m from the center of a merry-go- around moves with a speed of 1.40 m/s. Part A Calculate the centripetal acceleration of the child. a = Submit ▾ Part B 15. ΑΣΦ F = Request Answer Calculate the net horizontal force exerted on the child (m = 21.0 kg). 15. ΑΣΦ ? we m/s² ? N

University Physics Volume 1

18th Edition

ISBN:9781938168277

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

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

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 69P: (a) What is the radius of a bobsled turn banked at 75.0and taken at 30.0 m/s, assuming it is ideally...

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(a) What is the radius of a bobsled turn banked at 75.0and taken at 30.0 m/s, assuming it is ideally banked? (b) Calculate the centripetal acceleration. (c) Does this acceleration seem large to you?
A friction experiment is performed on a planet that has the same mass as Earth but half the radius. A 1.0-kg block is pulled along a horizontal dynamics track with a horizontal force of magnitude 15.0 N. If the coefficient of kinetic friction between the block and the track is 0.3, determine the acceleration of the block. O a. 14.26 m/s^2 O b. 12.06 m/s^2 O. 3.24 m/s^2 Od. 15.00 m/s^2
corre hacia acả v constante rueda hacia ac An acrobat who is on the lateral surface of a cylinder, moves his legs and moves the cylinder with constant velocity. The cylinder is on a rough horizontal surface (with friction). If the coefficient of friction between the shoes and the cylinder is mu = 0.21 determine the force of friction %3D between the cylinder and the acrobat A. 128.6 N B. 100 N C. 12.8 N D. 200 N E. 342 N F. ON G. 9.8 N H. None of the above 1. 21 N J. 132 N
An object is shot straight upward from sea level with an initial velocity of 450 ft/sec. d.Assuming that gravity is the only force acting on the object, give an upper estimate for.its velocity after 5 sec have elapsed. Use g= 32 ft/sec for the gravitational acceleration. b.Using At= 1 sec, find a lower estimate for the height attained after 5 sec. %3D a. The upper estimate for the velocity after 5 sec is ft/sec. b. The lower estimate for the height after 5 sec is ft.
2 W IP As you ride on a Ferris wheel, your apparent weight is different at the top than at the bottom. Explain. Essay answers are limited to about 500 words (3800 characters maximum, including spaces). 3800 Character(s) remaining Submit Request Answer Part B Calculate your apparent weight at the top of a Ferris wheel, given that the radius of the wheel is 7.8 m, it completes one revolution every 29 s, and your mass is 52 kg. Express your answer using two significant figures. IVE ΑΣΦ 3 7 E Wa top= Submit C 4 Request Answer R G Search or type URL % 5 T ? 6 Y N & 7 U * 00 8 + 1 * Course Home ( 9 * 2 =
ans. a) 3.41 N a) What is the tension in the string? m/sec. The length of the string is 1.2 m. The mass of the ball is 400 g. b) Draw the force diagram for the forces on the ball. View from above 6. A person swings a ball on a string in a horizontal circle over his head. The speed of the ball is 3.2
A boulder is being pushed by two different people on a flat terrain. The net force on the boulder can be expressed in the Cartesian coordinate system as vector f = (-4i + 5.5j)N. Where I and j denote directions to the east and north. A. Find the magnitude in N B. Find the direction (in degrees counterclockwise from the east axis) of the push.
To celebrate the start of October, you want to win a pumpkincatapult contest, which requires you to build a catapult and launcha pumpkin from it. You build your catapult so that it releases thepumpkin when the catapult arm is exactly vertical, as shown inthe picture. a.Draw a picture and make a list of known and unknownquantities for the scenario b.Suppose the catapult arm has a length of R = 3 m and the pumpkin undergoes uniform circular motion with an acceleration of a = 75 m/s^2 before it is launched. What is the speed of the pumpkin at the moment it is launched?
m R A racing greyhound can run around curves at high speed. Suppose the radius of a semicircular turn on a dogtrack is 21.6 m, and the speed of a greyhound is constant at 15.1 m/s; assume the dog's mass is 22.7 kg. What is the acceleration of the greyhound on the turn? (in m/s^2) OA: 4.487 OB: 5.070 OC: 5.729 OD: 6.474 OE: 7.316 OF: 8.267 OG: 9.342 OH: 10.556
A. Express the force F in Cartesian vector notations; if the force F =400 N B. Express the position vector RON in Cartesian vector notation if point N has a coordinates (1,2,0) C. Determine the magnitude of the projection of force along the u axis. F = 600 N A 4 m 4m- y N (1,2,0) Acti Go to
49. A 615-kg racing car completes one lap in 14.3 s around a circular track with a radius of 50.0 m. The car moves at constant speed. a. What is the acceleration of the car? b. What force must the track exert on the tires to produce this acceleration? 50. An athlete whirls in a 7.00-kg hammer tied to the end of a 1.3-m chain in a horizontal circle. The hammer makes one revolution in 1.0 s. a. What is the centripetal acceleration of the hammer? b. What is the tension in the chain?
A body of mass 2 kg moves in a (counterclockwise) circular path of radius 10 meters, making one revolution every 7 seconds. You may assume the circle is in the xy-plane, and so you may ignore the third component. A. Compute the centripetal force acting on the body. B. Compute the magnitude of that force. Note: Use exact forms or at least 4 significant digits in your answers.