An inventive child named Nick wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rope that passes over a frictionless pulley (see figure below), Nick pulls on the loose end of the rope with such a force that the spring scale reads 310 N. Nick's true weight is 280 N, and the chair weighs 160 N. Nick's feet are not touching the ground. Use g=9.8 m/s?. (b) Find Nick's acceleration, using upward as positive. m/s2 (c) Find the magnitude of force Nick exerts on the chair. (d*) Instead Nick hands the rope with the scale to his friend Barney, who stands on the ground. Barney pulls on the rope so that the spring scale again reads 310 N. What is Nick's acceleration now, again using upward as positive. m/s²

An inventive child named Nick wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rope that passes over a frictionless pulley (see figure below), Nick pulls on the loose end of the rope with such a force that the spring scale reads 310 N. Nick's true weight is 280 N, and the chair weighs 160 N. Nick's feet are not touching the ground. Use g=9.8 m/s?. (b) Find Nick's acceleration, using upward as positive. m/s2 (c) Find the magnitude of force Nick exerts on the chair. (d*) Instead Nick hands the rope with the scale to his friend Barney, who stands on the ground. Barney pulls on the rope so that the spring scale again reads 310 N. What is Nick's acceleration now, again using upward as positive. m/s²

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Description: An inventive child named Nick wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rope that passes over a frictionless pulley (see figure below), Nick pulls on the loose end of the rope with such a force th

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter4: The Laws Of Motion

Section: Chapter Questions

Problem 46P: In the situation described in Problem 45 and Figure P4.45, the masses of the rope, spring balance,...

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In the situation described in Problem 45 and Figure P4.45, the masses of the rope, spring balance, and pulley are negligible. Nicks feet are not touching the ground. (a) Assume Nick is momentarily at rest when he stops pulling down on the rope and passes the end of the rope to another child, of weight 440 N, who is standing on the ground next to him. The rope does not break. Describe the ensuing motion. (b) Instead, assume Nick is momentarily at rest when he ties the end of the rope to a strong hook projecting from the tree trunk. Explain why this action can make the rope break. Figure P4.45 Problems 45 and 46.
The cart in the figure is attached to special spring that can stretch and compress equally well. The springis very light. The cart and spring rest on a low-friction horizontal surface. The cart is pulled to position Iand then released. It moves to position V where it then reverses direction again to position I. A)Draw a force diagram forpoint I, cart moving left. B) Draw a force diagram forpoint III, cart moving left.
A force of 1.100×103 N pushes a man on a bicycle forward. Air resistance pushes against him with a force of 805 N . If he starts from rest and is on a level road, what speed ? will he be going after 35.0 m ? The mass of the bicyclist and his bicycle is 90.0 kg. 25.3 m/s 15.1 m/s 8.51 m/s 10.3 m/s
The cart in the figure is attached to special spring that can stretch and compress equally well. The springis very light. The cart and spring rest on a low-friction horizontal surface. The cart is pulled to position Iand then released. It moves to position V where it then reverses direction again to position I. A)Draw a force diagram forpoint V, cart moving right B) Draw a force diagram forpoint II, cart moving right
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