Activity 1. A 400 N bag of cement starts from rest and slides 12 m down a roof with a slope of 3 horizontal to 1 vertical and a coefficient of friction of 0.20. If the vertical distance from the edge of the roof to the ground is 10 m, how far from the wall will the bag of cement strike the ground? (Ans. x = 8.42 m) 12m 10 m ....=?.

Activity 1. A 400 N bag of cement starts from rest and slides 12 m down a roof with a slope of 3 horizontal to 1 vertical and a coefficient of friction of 0.20. If the vertical distance from the edge of the roof to the ground is 10 m, how far from the wall will the bag of cement strike the ground? (Ans. x = 8.42 m) 12m 10 m ....=?.

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

BOGART IS AN ADVENTUROUS MAN. HE WANTS TO CROSS THE 12-FT PLANK, WHICH COEFFICIENT OF FRICTION AT THE CONTACT POINTS A AND B IS µs = 0.4. AT WHAT DISTANCE x WILL BOGART START TO REALIZE THAT NOT EVERYTHING IN LIFE IS AN ADVENTURE (HE WILL REALIZE THE PLANK WILL SLIP!). ASSUME BOGART'S WEIGHT AS 85 LB. В 45° 15° 60°
What is the mass of the box?
A child of mass 26 kg , is sliding down a water-slide that has an angle of 32 deg. If the water lubricates the slide to a frictionless surface, and the slide is 9 meters long. What is the child's velocity at the bottom?
At an accident scene on a level road, investigators measure a car's skid mark to be 88 m long. It was a rainy day and the coefficient of friction was estimated to be 0.35. a.)Use these data to determine the speed of the car when the driver slammed on (and locked) the brakes. Express your answer to two significant figures and include the appropriate units.
You have devised an experiment to measure the kinetic coefficient of friction between a ramp and a mass. You place the mass on the ramp at an angle high enough that the mass starts sliding. You measure the time it takes to fall down a known distance. The time it takes to fall down the 45 degree ramp starting from a standstill is At = 0.46 sec, m=1 kg, and the distance it falls, Ax , is 0.5 m. What is µk? m Дх in At Uk
A book slides across a level, carpeted floor with an initial speed of 3.85 m/s and comes to rest after 3.75 m. Calculate the coefficient of kinetic friction μ between the book and the carpet. Assume the only forces acting on the book are friction, weight. and the normal force. H =
6. Son Ye Jin (SYJ), 45 kg, drops from a helicopter 4 km above the ground. Assume the air resistance is proportional to the velocity of the SYJ, with k 15 N-sec/m when the chute is closed and with constant k₂ = 105 N-sec/m when the chute is open. If the chute does not open until 1 min after SYJ paraglides, when will she hit the ground?
A tractor is speeding up at 3 m/s/s while pulling a 744 kg sled with a rope at an angle of 34 degrees. The coefficient of kinetic friction between the sled and ground is 0.5. What is the tension (Newtons) in the rope? (g=9.8 m/s2)
A car is moving at 20 m/s along a horizontal road has its brakes suddenly applied and eventually comes to rest. What is the shortest distance in which it can be stopped if the friction coefficient between tires and road is 0.90? Assume that all four wheels brake identically. If the brakes don't lock the car stops via static friction.
A 489-kg crate is placed on an adjustable inclined plane. As one end of the incline is raised, the crate begins to move downward. If the crate slides down the plane with an acceleration of 0.08 m/s2 when the incline angle is 31°, what is the coefficient of kinetic friction between ramp and crate? (g = 9.8 m/s2)
A 3.0-kg block sits on top of a 5.0-kg block which is on a horizontal surface. The 5.0-kg block is pulled to the right with a force F⃗ as shown in the figure . The coefficient of static friction between all surfaces is 0.56 and the kinetic coefficient is 0.39.What is the minimum value of F needed to move the two blocks? If the force is 10% greater than your answer for (a), what is the acceleration of each block?
At Ted's request, Bill pushes the pizza box across the granite countertop towards Ted. When the box leaves Bill's hand it is sliding at 2.60 m/s. The box comes to rest over a distance of 110 cm. What is the coefficient of kinetic friction, uk, between the pizza box and the countertop? (Ignore air drag.)