Consider a child who is swinging. As she reaches the lowest point in her swing: Select one: 1. A and B are correct. 2. her acceleration is downward at 9.8 m/s2 3. the tension in the rope is equal to her mass times her acceleration. 4. No correct answer 5. the tension in the rope is equal to her weight.

Consider a child who is swinging. As she reaches the lowest point in her swing: Select one: 1. A and B are correct. 2. her acceleration is downward at 9.8 m/s2 3. the tension in the rope is equal to her mass times her acceleration. 4. No correct answer 5. the tension in the rope is equal to her weight.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And Gravitation

Section: Chapter Questions

Problem 54AP: A 0.400-kg pendulum bob passes through the lowest part of its path at a speed of 3.00 m/s. (a) What...

See similar textbooks

Similar questions

A 0.400-kg pendulum bob passes through the lowest part of its path at a speed of 3.00 m/s. (a) What is the tension in the pendulum cable at this point if the pendulum is 80.0 cm long? (b) When the pendulum reaches its highest point, what angle does the cable make with the vertical? (c) What is the tension in the pendulum cable when the pendulum reaches its highest point?
A support system is mounted to a table. A spring is attached to the support system. A ball hangs from the end of the spring. A string is attached to the right side of the ball, a person pulls the string to the right. a. The ball is the system, what are the objects in the surroundings that interact with the system? I. Person II. Gravity III. Spring IV. Friction V. String VI. Ball VII. Table VIII. Earth IX. Normal Force X. Tension b. Sketch a force diagram for the system. Label all forces acting on the system.
You hang a ball using a 0.240m long string to a window. You pull it at an angle of 22.0° and then release it. a. how much time does it take for the ball to reach its highest speed? b. how much time does it take if the pendulum is released at an angle 11.0°
A pendulum is 0.890 m long, and the bob has a mass of 1.00 kg. At the bottom of its swing, the bob’s speed is 1.60 m/s. a. What is the tension in the string at the bottom of the swing? answer in N b. The tension is greater than the weight of the bob because of which of the following? its horizontal component is increasing from zero. the bob has zero acceleration. the bob has a downward acceleration, so the net Fy must be downward. the bob has an upward acceleration, so the net Fy must be upward.
The tension on the string of the simplependulum is 8.5 N when it is inclined 30degrees from the vertical. The mass of thependulum is 0.5 kg and the length of the stringis 2 m. What is the normal acceleration of thependulum at this instant?a. 6.52 m/s2 b. 4.50 m/s2c. 8.49 m/s2 d. 2.74 m/s2
4. A tetherball of mass m is attached to the ceiling by a cord of length L. Someone gives it a push, causing it to swing around in a horizontal circle with a constant speed v, so that the cord forms an angle from vertical (see figure). If m = 0.425 kg, L = 2.15 m and = 25.0°, find a. the magnitude of the tension in the cord. b. the speed v. L וח
A block rests on a rough surface inclined at an angle e. (Note that o is the angle of friction.) 1.What happens if e 4? A. The motion is impending. B. Kinetic friction then exists. C. The static friction is fully utilized. D. The block is stationary. Answer: (Write the answer in UPPERCASE. Do not include periods or spaces.)
A tire (mass m) is at the end of a rope (length L) which is hanging off of the branch of a tree. Someone pulls the tire back till the rope is an angle (theta) away from the vertical "axis". The person then releases the tire and it swings. 1. What is the tire’s speed as it swings through it's lowest point? 2. What is the tension in the rope as the tire swings through it's lowest point?
A pendulum is 0.850 m long, and the bob has a mass of 1.00 kg. At the bottom of its swing, the bob’s speed is 1.60 m/s. A) What is the tension in the string at the bottom of the swing? in N B)The tension is greater than the weight of the bob because a- its horizontal component is increasing from zero. b-the bob has a downward acceleration, so the net Fy must be downward. c- the bob has an upward acceleration, so the net Fy must be upward. d- the bob has zero acceleration.
8. A delivery person in an elevator is holding a package by an elastic cord. a. What happens to the length of the cord when the elevator accelerates upward? Draw the FBD for the package. b. What happens to the cord length when the elevator slows to a stop after its ascent? Draw the FBD.
1. A tightrope walker with mass 50 kg stands on a taught rope such that the rope makes a 10 degree angle to the horizontal on each side of the walker. What is the tension in the rope? Optional Answers: 1. 1440 N 2. 144 N 3. 250 N 4. 500 N 2. One end of a 1-m-long spring is attached to the ceiling. When a 20 kg mass is attached to the other end the spring is stretched to 2.5 m. What is the spring constant? Optional Answers: 1. 200 N 2. 80 N/m 3. 13.3 N/m 4. 133 N/m 3. The mass is removed from the 1-m-long spring in the previous problem and replaced with a 50 kg mass. What is the new length of the spring? Optional Answers: 1. 4.75 m 2. 2.5 m 3. 3.75 m 4. 1 m 4. Copper wire with diameter 1 cm and unstretched length 20 m is stretched by a 5000 N tension force. By how much is the wire stretched? The Young's modulus of copper is 128x10^9N/m^2 Optional Answers: 1. 1.0 cm 2. 0.5 mm 3. 20.01 m 4. 2.5 mm
P1 A pendulum of length L with a bob of mass m is released from the vertical position without initial speed. Under the suspension point, a nail is fixed at a distance of L – x. The thread of the pendulum gets stuck in the nail during its motion so that the bob starts to move on a circular path of radius x after it has reached its lowest position. L m a) At most how large should x be if the bob executes a complete circle? b) If x = L/3, calculate the tension in the thread when the bob reaches its highest po- sition during the motion after the thread gets stuck in the nail.