In the figure, a man is trying to get his car out of mud on the shoulder of a road. He ties one end of a rope tightly around the front bumper and the other end tightly around a utility pole 18 m away. He then pushes sideways on the rope at its midpoint with a force of 470 N, displacing the center of the rope 0.42 m from its previous position, and the car barely moves. What is the magnitude of the force on the car from the rope? (The rope stretches somewhat.) 수.

In the figure, a man is trying to get his car out of mud on the shoulder of a road. He ties one end of a rope tightly around the front bumper and the other end tightly around a utility pole 18 m away. He then pushes sideways on the rope at its midpoint with a force of 470 N, displacing the center of the rope 0.42 m from its previous position, and the car barely moves. What is the magnitude of the force on the car from the rope? (The rope stretches somewhat.) 수.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter10: Systems Of Particles And Conservation Of Momentum

Section: Chapter Questions

Problem 43PQ: A 44.0-kg child finds himself trapped on the surface of a frozen lake, 10.0 m from the shore. The...

See similar textbooks

Similar questions

A cart with mass mc = 850g is rolling along a frictionless track with a speed of vci=9.00 m/s. A block is then dropped vertically onto the cart. After it is dropped onto the cart, the system has a speed of vf=6.75 m/s. a) What is the mass of the block that was dropped on the cart? b) The cart then collides with an airbag and comes to a stop in a time ∆t = 0.015s. What is the magnitude of the average force on the system during the collision with the air bag?
A man with mass m1 = 51 kg stands at the left end of a uniform boat with mass m2 = 168 kg and a length L = 3.3 m. Let the origin of our coordinate system be the man’s original location as shown in the drawing. Assume there is no friction or drag between the boat and water. 1) If the man now walks to the right edge of the boat, what is the location of the center of mass of the system? 2) After walking to the right edge of the boat, how far has the man moved from his original location? (What is his new location?) 3) After the man walks to the right edge of the boat, what is the new location the center of the boat? 4) Now the man walks to the very center of the boat. At what location does the man end up?
A 791 N man stands in the middle of a frozen pond of radius 9.0 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 1.2 kg physics textbook horizontally toward the north shore at a speed of 9.0 m/s. How long does it take him to reach the south shore?
Cedar has been trying to get Liam's attention for weeks. He decides to make a paper airplane to hit Liam in the back of his head (and grab his attention). If the paper airplane flies 2.64 m [W 26˚ N] and then is caught by the wind, which causes it to travel 3.21 m [S 12˚ E]. What is the paper airplane's total displacement? (please hand-write it and make it clear)
A 764-N man stands in the middle of a frozen pond of radius 6.0 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 1.2-kg physics textbook horizontally toward the north shore at a speed of 6.0 m/s. How long does it take him to reach the south shore? _____s
Two objects (m1 = 4.70 kg and m2 = 2.85 kg) are connected by a light string passing over a light, frictionless pulley as in the figure below. The 4.70-kg object is released from rest at a point h = 4.00 m above the table. answer all of the follwing parts (a) Determine the speed of each object when the two pass each other. m/s(b) Determine the speed of each object at the moment the 4.70-kg object hits the table. m/s(c) How much higher does the 2.85-kg object travel after the 4.70-kg object hits the table?
A ? = 20.0 [kg] block slides down a ? = 35.0◦ incline as shown, leaving the end with a speed of ?? = 1.10 [m/s]. At the same time, a ? = 70.0 [kg] cart, whose top end is located h = 2.00 [m] below the end of the chute, moves to the left with a speed of ?? = 2.00 [m/s], and catches the block as it falls. Once the cart catches the block, both move with the same speed. You may ignore friction. A. What is the speed of the block just as it hits the cart? B. What is the velocity of the block-cart system after the cart catches the block? C. What's the change in energy of the cart and block immediately before and immediately after the collision?
A small block of mass m1 = 0.770 kg is released from rest at the top of a curved wedge of mass m2 = 7.50 kg, which sits on a frictionless horizontal surface. When the block leaves the wedge, its velocity is measured to be 4.00 m/s to the right. (a) What is the velocity of the wedge after the block reaches the horizontal surface? (Enter the magnitude of the velocity.) m/s(b) What is the height h of the wedge? m
The figure below shows a bullet of mass 230g traveling horizontally towards the east with a speed of 415m/s, which strikes a block of mass 7.5kg that is initially at rest on a frictionless table. After striking the block, the bullet is embedded in the block and they begin to move as one unit. A. What is the magnitude (in m/s) and direction of the velocity of the block/bullet unit immediately after the impact? B. What is the magnitude (in N * s) and direction of the of the impulse of the block on the bullet? C. What is the magnitude ( in N *s) and direction of the impulse of the bullet and the block?
A rocket has a total mass of 1.01 105 kg and a burnout mass of 1.14 104 kg, including engines, shell and payload. The rocket blasts off from Earth and exhausts all its fuel in 4.31 min, burning the fuel at a steady rate with an exhaust velocity of ve= 4.66 103 m/s. (a) If air friction and gravity are neglected, what is the speed of the rocket at burnout? m/s(b) What thrust does the engine develop at liftoff? N(c) What is the initial acceleration of the rocket if gravity is not neglected? m/s2(d) Estimate the speed at burnout if gravity isn't neglected. m/s
A meter stick has a center of mass at the 50 cm mark. Using two fingers, one at the 20 cm mark and the other at the 30 cm mark, you hold the meter stick in a horizontal, stationary position. Given the force at the 20 cm mark is 2 N, find the mass of the meter stick.
1. What does the rate of change of linear momentum of a system represent? a. The mechanical energy of the system. b. The net external force acting on the system. c. The kinetic energy of the system. d. The acceleration of the system. 2. What physical quantities are conserved during an elastic collision? a. Linear momentum b. Mass c. Kinetic energy d. All the answers are correct.