*86. mmh The drawing shows a large cube (mass = 25 kg) being accel- erated across a horizontal frictionless surface by a horizontal force P. A small cube (mass = 4.0 kg) is in contact with the front surface of the large cube and will slide downward unless P is sufficiently large. The coefficient of static friction between the cubes is 0.71. What is the smallest magnitude that P can have in order to keep the small cube from sliding downward? Hs = 0.71 Frictionless

*86. mmh The drawing shows a large cube (mass = 25 kg) being accel- erated across a horizontal frictionless surface by a horizontal force P. A small cube (mass = 4.0 kg) is in contact with the front surface of the large cube and will slide downward unless P is sufficiently large. The coefficient of static friction between the cubes is 0.71. What is the smallest magnitude that P can have in order to keep the small cube from sliding downward? Hs = 0.71 Frictionless

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 block is being pulled up an inclined plane by a force with magnitude F=45.0 N as shown In the figure above. The block has a mass of m =1.35 kg. The coefficient of kinetic friction between the block an the surface of the incline plane is µ = 0.287. The inclined plane makes an angle \theta= 31.7 degrees with respect to the horizontal. What is the magnitude of the acceleration of the mass?
In the figure, two blocks are connected over a pulley. The mass of block A is 6.50 kg and the coefficient of kinetic friction between A and the incline is 0.120. Angle 0 of the incline is 43.0°. Block A slides down the incline at constant speed. What is the mass of block B? Frictionless, massless pulley A B Number i Units
You are out on a hike and come across an unfortunate scene: a fellow hiker has fallen off a ledge. You happen to be carrying a long rope, and bravely decide to help. You tie the rope to a rock of mass mR=500 kgmR=500 kg and make your way over the ledge (see figure). If the coefficient of static friction between the rock and the ground is μS=0.355μS=0.355, and your mass is mH=70.5 kgmH=70.5 kg, what is the maximum mass of the fallen hiker (mFmF) that the rock can hold so that you two can make it back up from the ledge? Assume that where the rope passes the ledge is frictionless and that the rope is parallel to the ground.
The 137-lb force P is applied to the 240-lb crate, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the crate. The friction force is positive if to the right, negative if to the left. Assume μ = 0.51, Mk = 0.39. P Answer: F = i Mk lb
Applying the rules of significant figures and calculate 1. 123.4 + 120 + 4.822 -21 2. 185.643*0.0034/3022 3. (523400*0.0032)+253
You are quite excited with the lesson in friction that you learned in Physics 1A that you decide to measure the coefficient of kinetic friction of surfaces. You try your idea on a glass surface and a glass cup (mass = 0.15 kg). You set the glass cup moving with an initial speed of 2.8 m/s. After travelling a length of 1 m, it stopped. What then is the coefficient of kinetic friction of the glass-glass surfaces? 0.42 0.94 0.56 O 0.15 0.40 O O
B9
An empty sled of mass 25 kg slides down a muiddy hill with a constant speed of 2.4 m/s The slope of the hill is inclined at an angle of 15 degrees with the horizontal. a. Calculate the frictional force on the sled as it slides down the slope b.Calculate the coefficient of friction between the sled and the muddy surface of the slope c. The sled reaches the bottom of the slope and continues of horizontal ground. Assume the same coefficient of friction. In terms of velocity and acceleration, describe the motion of the sled as it travels on horizontal ground.
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 2.7-kg projectile from rest to a speed of 8.3 x 10³ m/s. The net force accelerating the projectile is 4.9 x 105 N. How much time is required for the projectile to come up to speed? i 189.8 Units S
A shopper pushes a 7.7 kg cart at constant of 1.20 m/s speed along a rough horizontal surface by applying a force of 21.7 N at an angle of 36.5° below the horizontal. What is the coefficient of kinetic friction between the cart and the surface? v Fa 0.288 0.279 0.231 0.197
A sled and rider have a total mass of 60.0 kg. They are on a snowy hill. The coefficient of kinetic friction between the sled and the snow is 0.150. The angle of the hill's slope measured upward from the horizontal is 24.0°. What is the acceleration of the rider?Is the acceleration greater, less than, or equal to your result if a more massive rider uses the same sled on the same hill? Explain.
You want to lift a heavy box with a mass L = 89.0 kg using the two-ideal pulley system as shown. With what minimum force do you have to pull down on the rope in order to lift the box at a constant velocity? One pulley is attached to the ceiling and one to the box. L kg N