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Review Question 3.3 An elevator in a tall office building moves downward at constant speed. How does the magnitude of the upward force exerted by the cable on the elevator
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Chapter 3 Solutions
COLLEGE PHYSICS:VOL.1
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- Give reasons for the answers to each of the following questions: (a) Clan a normal force be horizontal? (b) Can a normal force be directed vertically downward? (c) Consider a tennis ball in contact with a stationary floor and with nothing else. Can the normal force be different in magnitude from the gravitational force exerted on the ball? (d) Can the force exerted by the floor on the hall be different in magnitude from the force the ball exerts on the floor?arrow_forwardIn your own words, describe the difference between the terms gravitational force and gravitational field.arrow_forwardReview. The gravitational force exerted on a baseball is 2.21 N down. A pitcher throws the ball horizontally with velocity 18.0 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 170 ms. The ball starts from rest, (a) Through what distance does it move before its release? (b) What are the magnitude and direction of the force the pitcher exerts on the hall?arrow_forward
- PRINTER VERSION 1 BACK Chapter 07, Problem 007 Your answer is partially correct. Try again. A 4.6 kg body is at rest on a frictionless horizontal air track when a constant horizontal force F acting in the positive direction of an x axis along the track is applied to the body. A stroboscopic graph of the position of the body as it slides to the right is shown in the figure. The force F is applied to the body at t = 0, and the graph records the position of the body at 0.50 s intervals. How much work is done on the body by the applied force F between t = 0 and t = 1.8 s? rt%3D0 0.5 s -1.0s 1.5 s 2.0 s- LIT 0.2 0.4 0.6 0.8 x (m) Number To.8 Units the tolerance is +/-2% Click if you would like to Show Work for this question: Open Show Work SHOW HINT LINK TO TEXT LINK TO SAMPLE PROBLEM VIDEO MINI-LECTURE search 9:06 PM ENG 4/4/2021 SUS pgup pgdn 17 end prt sc pause insert delete break %23 3 5. 6. backspacarrow_forward1.) A proton is moving to the right (along the positive x-axis) under the influence of an electrical field. It starts off with an initial velocity of 8x104" and comes to a stop over a distance of 1 kilometer. It travels in a straight line. a) What is the force that the proton experiences (magnitude and direction)? b) What is the magnitude and direction of the electrical field?arrow_forwardIn this problem you will measure the gravitational constant in a series of “observational experiments,” making use of Newton’s law of gravitation and second law of motion as well as Kepler’s third law of planetary motion Part (a) Newton measured the centripetal acceleration of the moon in its orbit around Earth by comparing the force Earth exerts on the moon with the force Earth exerts on an apple. He obtained a value of ac = 2.72×10-3 m/s2. If Newton had taken the mass of Earth to be ME = 6.01×1024 kg and the mean distance between the centers of Earth and the moon to be RME = 3.85×108 m, what value would he have obtained for the gravitational constant, in units of N⋅m2/kg2? G = 6.685 * 10( - 11 )G = 6.685E-11 ✔ Correct! Part (b) Since measuring the centripetal acceleration of an orbiting body is rather difficult, an alternative approach is to use the body’s rotational period instead. Enter an expression for the gravitational constant, in terms of the distance…arrow_forward
- Question 1 Which direction does the normal force on the point in? M Ms Mx O Impossible to determine Directly upward Angle 0 from the horizontal Angle 0 from the verticalarrow_forwardA 500 N block is being pushed along a frictionless horizontal surface by a force of 150 N at 40° to the horizontal. What is the normal force from the surface on the object? A) 96 N B) 150 N C) 404 N D) 500 N E) 596 N 150 N 500 N 40.0°arrow_forward1 po A cart of weight W is lifted up at constant speed by a steel cable attached to an electric pulley. Assuming there is no resistive forces and the mass of the steel cable is negligible compared to the mass of the cart, what can we conclude about the force T. exerted by the cable on the cart? T=W, T is directed upward Tarrow_forwardCalculate the magnitude of the normal force on a 17.7 kg block in the following circumstances. a.The block is resting on a level surface. b.The block is resting on a surface tilted up at a 20.8° angle with respect to the horizontal. c.The block is resting on the floor of an elevator that is accelerating downward at 3.78 m/s2. d.The block is on a level surface and a force of 115 N is exerted on it at an angle of 20.8° above the horizontal.arrow_forwardANSWER 13 TO 16 13. What happens to the object when you apply a constant force on it in space? A.It will continuously move B.It will move faster C.None of the above D.It will not move 14. What is the direction of the force of two objects that are in contact with each other? A.same directions B.opposite direction C.can be both A and B D.none of the above 15. How will you describe the force attraction of the Earth and the moon considering their size and mass? A.There is no force of attraction. B.The forces between the moon and the earth are equal but opposite in direction. C.The forces between the moon and the earth are unequal and opposite. D.The forces between the moon and the earth are equal and opposite. 16. What is the reaction force applied to an object if the action force is 17 Newtons? A.Equal to 0 N B.Less than 17 N C.Equal to 17 N D.Greater than 17 Narrow_forwardCalculate the net force being applied to the objects. Include SIZE and DIRECTION. 5 N 2N 52 12 N< 3N 3 N O 17 N→ 10 Narrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
- Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
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