A 54.0-kg ice skater is moving at 3.90 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.910 m around the pole. (a) Determine the magnitude of the force exerted by the horizontal rope on her arms. kN (b) Compare this force with her weight. F. rope =

A 54.0-kg ice skater is moving at 3.90 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.910 m around the pole. (a) Determine the magnitude of the force exerted by the horizontal rope on her arms. kN (b) Compare this force with her weight. F. rope =

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Say that an object of mass is pushed by a system of two radial Forces and moves with a constant speed V In a circle. Which of the following relations are true about this motion? A) The acceleration of the system is zero because the speed is constant B) The object will experience a net centrifugal force that will tend to throw the mass out of the circle C) The object will experience a net centripetal force that will tend to keep the mask on the circle. D) F1-F2=mv^2/r E) Only (c) and (d) are true
5
Suppose a toy car experiences two horizontal forces: A time-dependent force from its motor of F = 2.0e-0.5tN, and kinetic friction with a coefficient of u = 0.1 from its wheels and bearings. What will its maximum speed be on level ground if it starts from rest? %3D %3D
1. A racing bicycle with rider has a combined mass of 85 kg. The racer is on a velodrome (circular racing track) that has banked curves. The surface is banked at an angle of 35° from horizontal. The track has a radius of 60 m. a) Draw a free-body diagram of the racer viewing the racecar from the front (left) and from above (right.) Ignore friction. Indicate the direction of the acceleration of the racer next to your diagram. b) Based on your free-body diagram do you think the car could possibly stay on a circular path (the track) without friction? Explain. c) Which of the forces you drew has a component in the same direction as the acceleration? Explain. d) Write down your force equations and solve for the acceleration of the racer moving at a constant speed around the track with no friction. (Hint: Use the direction of the acceleration as one of your axes. Do not use along-the-incline and perpendicular-to- the-incline as your axes.) e) What speed would the racer have with this…
286
A mischievous child ties a June Bug (a large beetle) on to string. The child holds his arm above his head and the bug attached to the string flies around in a horizontal circle. What is the direction of the net force on the bug?
A high-speed railway car goes around a flat, horizontal circle of radius 450 m at a constant speed. The magnitudes of the horizontal and vertical components of the force of the car on a 55.0 kg passenger are 204 N and 539 N, respectively. (a) What is the magnitude of the net force (of all the forces) on the passenger? (b) What is the speed of the car? (a) Number i (b) Number Units Units
A 1.2 kg ball on a string is traveling in an 4.3 m vertical circle with a speed of 2.3 m/s. Determine the tension (T) in the string at the bottom of the circle. Use g = 10 N/kg.
a The deflection of the needle would decrease. b The deflection of the needle would increase. c The needle would return to its rest position. d The needle would deflect in the opposite direction.
When rapidly turning a corner on a flat road, a cyclist leans into the center of the turn. The frame of the bike is nearly parallel to which vector? a) the force of gravity on the bicycle and rider b) the normal force on the pair c) the centripetal force d) the sum of the normal and friction forces
Question 13 One of the critical training components for NASA astronauts is the weightlessness simulation (which is really zero normal force). The astronauts are flown in a vertical circle in an airplane. T experience weightlessness, how fast should the airplane be moving at the top of the vertical circle? The diameter of the trajectory is 4.61 km. Use g = 9.80 m/s (PAMP1312F20) a) 0425 m/s b) O 106 m/s c) O 213 m/s d) O 301 m/s e) O 150 m/s Revie
A lead fishing weight of mass 0.20 kg is tied to a fishing line that is 0.50 mm long. The weight is then whirled in a vertical circle. The fishing line will break if its tension exceeds 80 N. A) bottom B)At what speed will the string break?