Two people pull a block on a rough horizontal surface. One suggests to use a rope that is inclined at angle 70° and another suggests to use a rope at angle 20°. If they pull for the same horizontal distance with the same strength of force, which person does more work? At the end of the same distance pulled, which block is moving faster? Instead, the surface over which the blocks move is now frictionless. How does this change your answers to the questions above?

Two people pull a block on a rough horizontal surface. One suggests to use a rope that is inclined at angle 70° and another suggests to use a rope at angle 20°. If they pull for the same horizontal distance with the same strength of force, which person does more work? At the end of the same distance pulled, which block is moving faster? Instead, the surface over which the blocks move is now frictionless. How does this change your answers to the questions above?

Name: Two people pull a block on a rough horizontal surface. One suggests t
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: Two people pull a block on a rough horizontal surface. One suggests to use a rope that isinclined at angle 70° and another suggests to use a rope at angle 20°.If they pull for the same horizontal distance with the same strength of force, which perso

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A 7 kg block is moved up a 25 degree incline by a force of 69 N, parallel to the incline. The coefficient of kinetic friction between the block and the incline is 0.35. How much work is done by the 69 N force in moving the block a distance of 8 meters? What is the total work done on the block over the same distance? What is the final velocity if the initial velocity is Zero?
I drive a Nissan Leaf to work. With the e-pedal on, the motor recovers energy through braking very aggressively. I need about 7 KW-hour to come to school if I use mostly the freeways. That’s about 5 KW-hour if I take mostly local streets. From the energy perspective, can you offer an explanation to explain this difference?
A 10 kg barbell is rolling down a hill. There is no friction or air resistance acting on it, only the force of gravity. If it starts out moving 2 ms1, and ends up moving 7 ms1, then how much work does gravity do on it?
A pendulum with a light string and a mass attached to it. As the pendulum swings downward. What is the work done by the strings tension on the mass (+, - or 0) and why?
B. Word Problem. Directions: Solve the following word problems. Show your solution. (1) A food shipper pushes a wood crate of cabbage heads (total mass m 14 kg) across a concrete floor with a constant horizontal force of magnitude F=40 N. In a straight-line displacement of magnitude d = 0.50 m, how much work is done? A 50 kg child climbs a 10 m long slide with a horizontal inclination of 30 degrees. What is the child's potential energy against the ground? (2) 10 A string in a hand exerciser requires a force of 50 N to compress it by a quarter of a meter. What is the spring constant of the string? (4) (3) A 1 kg ball is rolling down a hill, with an initial velocity of 2m/s. (A as initial position, B as final position). (a) What is the kinetic energy of the ball at the top mg of the hill (A), if the Ah is 2m? Ah (b) What is the mechanical energy of the ball halfway downhil1? B V mg
Jane and Madison, push against a wall. Jane stops after 10 min, while Madison is able to push for 5.0 min longer. Compare the work they do.
Please see attached image for question. Thank you
a) If you push a lawn mower across a yard in 10 seconds, how does the work done compare with pushing it across the same yard in 20 seconds? Explain why. b) How does the power for 10 seconds compare to the power for 20 seconds?
A cashier pushes a grocery cart 5m with a horizontal force of 50 N. How much work is done by the cashier on the grocery cart?
In the pitching motion, a baseball pitcher exerted an average horizontal force of 80 N against the 0.15 kg baseball while moving it through a horizontal displacement of 2.2 m before he leased it. How much work did the pitcher do to the baseball as a result of this force? Group of answer choices 120 J 176 J 12 J 26.4 J
Garfield and Jon fought. To patch things up with Jon, Garfield caught a mouse who was eating Jon’s favorite cheese in the last few days. While the mouse was sleeping on a rug, Garfield put a cage on it and drag the rug towards Jon with a constant horizontal force of 4 N at a constant speed . If Garfield’s force did work at a rate of 8 W, How fast was he pulling on the rug? How much work did Garfield do in 5 s?
Q14. A 2 kg mass is projected down a rough circular track (R = 2m) as shown. The speed of the mass at point A is 4 m/s, and at point B, it is 6 m/s. How much work is done on the mass between A and B by the force of friction?