Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 8, Problem 42AP
To determine
The minimum power of driving motor required to accelerate the packages and keep the belt moving at constant speed.
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Work is equal to force times the distance. This means that to do the same amount of work, a greater distance requires less force. Consider a see-saw in balance. One object, A, is placed D from the fulcrum and the other object, B, is placed 1/2D from the fulcrum. Which object weighs more?
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Chapter 8 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 8.1 - Consider a block sliding over a horizontal surface...Ch. 8.2 - A rock of mass m is dropped to the ground from a...Ch. 8.2 - Three identical balls are thrown from the top of a...Ch. 8.3 - You are traveling along a freeway at 65 mi/h. Your...Ch. 8 - Prob. 1PCh. 8 - A 20.0-kg cannonball is fired from a cannon with...Ch. 8 - A block of mass m = 5.00 kg is released from point...Ch. 8 - At 11:00 a.m, on September 7, 2001, more than one...Ch. 8 - A light, rigid rod is 77.0 cm long. Its top end is...Ch. 8 - Prob. 6P
Ch. 8 - A crate of mass 10.0 kg is pulled up a rough...Ch. 8 - A 40.0-kg box initially at rest is pushed 5.00 m...Ch. 8 - Prob. 9PCh. 8 - As shown in Figure P8.10, a green bead of mass 25...Ch. 8 - At time ti, the kinetic energy of a particle is...Ch. 8 - A 1.50-kg object is held 1.20 m above a relaxed...Ch. 8 - Prob. 13PCh. 8 - An 80.0-kg skydiver jumps out of a balloon at an...Ch. 8 - You have spent a long day skiing and are tired....Ch. 8 - The electric motor of a model train accelerates...Ch. 8 - An energy-efficient lightbulb, taking in 28.0 W of...Ch. 8 - An older-model car accelerates from 0 to speed v...Ch. 8 - Prob. 19PCh. 8 - There is a 5K event coming up in your town. While...Ch. 8 - Prob. 21PCh. 8 - Energy is conventionally measured in Calories as...Ch. 8 - A block of mass m = 200 g is released from rest at...Ch. 8 - Prob. 24APCh. 8 - Prob. 25APCh. 8 - Review. As shown in Figure P8.26, a light string...Ch. 8 - Consider the blockspringsurface system in part (B)...Ch. 8 - Why is the following situation impossible? A...Ch. 8 - Jonathan is riding a bicycle and encounters a hill...Ch. 8 - Jonathan is riding a bicycle and encounters a hill...Ch. 8 - As the driver steps on the gas pedal, a car of...Ch. 8 - As it plows a parking lot, a snowplow pushes an...Ch. 8 - Prob. 33APCh. 8 - Prob. 34APCh. 8 - A horizontal spring attached to a wall has a force...Ch. 8 - Prob. 36APCh. 8 - Prob. 37APCh. 8 - Review. Why is the following situation impossible?...Ch. 8 - Prob. 39APCh. 8 - A pendulum, comprising a light string of length L...Ch. 8 - Prob. 41APCh. 8 - Prob. 42APCh. 8 - Prob. 43APCh. 8 - Starting from rest, a 64.0-kg person bungee jumps...Ch. 8 - Prob. 45CPCh. 8 - A uniform chain of length 8.00 m initially lies...Ch. 8 - Prob. 47CP
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- The mover in problem 13 uses a ramp, which makes the task easier by requiring a smaller force to raise the crate to the truck bed. This force must be exerted over a greater distance, so the work done should be the same. In reality, because of the frictional force between the crate and the ramp, the work required is greater than that needed to lift the crate directly onto the truck. The mover does 4365 J of work sliding the crate up the ramp. The force the mover exerts on the crate is 1302 N. How long is the ramp?arrow_forwardA 2,200-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 4.60 m before coming into contact with the top of the beam, and it drives the beam 15.0 cm farther into the ground as it comes to rest. Using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest. 588925.42 magnitude Write an expression for the work done by all of the forces acting on the beam as it moves into the ground and relate that work to the change in energy of the pile driver in order to find the force that the beam exerts on the pile driver. Narrow_forwardanswer no. 3 draw the free body diagramarrow_forward
- The electric motor of a model train accelerates the train from rest to 0.640 m/s in 16.0 ms. The total mass of the train is 760 g. Find the average power delivered to the train during its acceleration. ____________Warrow_forwardA frictionless cart is pulled 9.50 m up an inclined plane in 24.6 s. The power output of the motor used to move the cart is 3.30 ´ 102 W. What is the force used to move the cart up the inclined plane?arrow_forwardA roller coaster filled with 20 people weighs 2645 kg. It is speeding through the track at 10.74 m/s and comes up to the peak of the ride which is 37.02 m from the ground. What is the total mechanical energy of the roller coaster at this point? O 1.113 x 105 j 1.113 x 106 J 1.11 x 106 J O1.11 x 105 Jarrow_forward
- Please answer this, I need help.arrow_forwardA satellite is orbiting the earth in a perfectly circular orbit of radius 7.0 x 10³ km at constant speed. The satellite's mass is m = 1.00 x 102 kg. The Earth's mass is 5.97 x 1024 kg. How much work does the Earth do on the satellite during one full orbit of the satellite?arrow_forwardThe 1.1-kg collar travels with negligible friction on the vertical rod under the action of the constant force P = 23 N. If the collar starts from rest at A, determine its speed as it passes point B. The value of R is 1.7 m. 3 R P m Answer: VB = i m/sarrow_forward
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