Problem 1: A 2.80kg block is placed on a rough (µs=0.540) incline that makes an angle of 52.0° with respect to the horizontal. A pushing force horizontal to the ground is applied to the top of the block (This would make the force have an angle of 52.0° below the surface of the inclined plane, up the plane) to make the block stationary on the plane. What is the minimum pushing force needed to keep the block stationary on the plane? (10 points)

Problem 1: A 2.80kg block is placed on a rough (µs=0.540) incline that makes an angle of 52.0° with respect to the horizontal. A pushing force horizontal to the ground is applied to the top of the block (This would make the force have an angle of 52.0° below the surface of the inclined plane, up the plane) to make the block stationary on the plane. What is the minimum pushing force needed to keep the block stationary on the plane? (10 points)

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 force is specified by the vector F = (130i + 100j - 200k) N. Calculate the angles made by F with the positive x-, y-, and z-axes. Answers: 0x = Oy= 0 || 0₂ = D i i
A force is specified by the vector F = (105i +95j-150k) N. Calculate the angles made by F with the positive x-, y-, and z-axes. Answers: e, W
A 1520-N crate is to be held in place on a ramp that rises at 30.0° above the horizontal (see figure). The massless rope attached to the crate makes a 22.0° angle above the surface of the ramp. The coefficients of friction between the crate and the surface of the ramp are uk = 0.450 and ls = 0.650 The pulley has no appreciable mass or friction. What is the MAXIMUM weight w that can be used to hold this crate stationary on the ramp? w = ? 22.0° Crate Ramp 30.0°
The slope of the 5.0 KN force F is specified as shown in the figure. Express F as a vector in terms of the unit vectors i and j. Assume a = 13, b = 6. Answer: F = ( F b i+ j) KN
(6%) Problem 8: Four forces (1, 2, 3, and 4) are in the x-y plane and act on an irregularly shaped object, as shown. Force 1 has a magnitude of F1 = 2.66 N and a point of application on the y axis a distance r with the dashed line that is parallel to the x axis, as shown. Force 2 has a magnitude of F2 = 4.13 2.55 m from the origin. Force 1 makes an angle of a = 25.4 degrees N and a point of application that is a distance r2 = 3.87 m from the origin. Force 2 is F2 perpendicular to a line connecting its point of application to the origin. Force 3 has a magnitude of F3 = 4.13 N and a point of application on the x axis a distance r3 = 2.55 m from the origin. Force 3 makes an angle of ß = 21.3 degrees with the dashed line that is parallel to the y axis, as shown. Force 4 has a magnitude of F4 = 2.66 N and its point of application is the origin. F. F, B What is the magnitude of the net torque about the z axis (which is directed out of the screen at the origin) in units of N m? Grade Summary…
Problem 1: Consider the force shown in the illustration. From the choices below, choose the surface that could produce this force. Multiple Choice : 1) A handicap ramp low on the left and high on the right 2) A floor 3) An inclined ceiling low on the left and high on the right 4) A wall 35° y n = 650 N I
A student pushes a 64.0 kg sofa with a force of 89.0 N [→ 37°↓]. Her father helps her by pulling the sofa from the other side with a force of 77.0 N [→ 36°↑]. The co-efficient of friction is 0.10. Draw an Fbd of the sofa including the angles. Determine the net force
To determine Cartesian force components from the magnitude and determine the position and resultant vectors by summing Cartesian components. As shown, a 3.1-lb ball is suspended at point D inside a box with dimensions w=9.50 ft, d=6.70 ft, and h=4.10 ft. The ball is held in place by three cables anchored at points A, B, and C on the surface of the box. If point D is the origin of the Cartesian coordinate system, point A is located at (−4.60,−3.50,2.50) ft, point B is located at (2.10,−3.50,1.90) ft, and point C is located at (2.10,6.00,−1.60) ft. 1) The tension in cable DA has a magnitude of TDA=7.66 lb. Find the Cartesian components of tension TDA, which is directed from D to A. so TDA=? 2)If the tensions in cables DA and DB are TDA=7.66 lb and TDB=5.56 lb, respectively, what is the tension in cable DC? so TDC=?
A 25kg wooden plate is held in place by two strings attached to the ceiling and the wall. The string attached to the ceiling makes an angle 40o with the horizontal and the string attached to the wall makes 90o with the wall. Determine the force in each string.
Problem 9.35 - Enhanced - with Expanded Hints An 8.5 kg crate is pulled 5.1 m up a 30° incline by a rope angled 16° above the incline. The tension in the rope is 140 N and the crate's coefficient of kinetic friction on the incline is 0.25. For help with math skills, you may want to review: The Vector Dot Product ▼ SOLVE: Part B WT = T·Ar=TAx cos(16) = (140 N) (5.1 m) cos(16) = 690 J WG = FG Ar = mg▲x cos(120°) = (8.5 kg) (9.8 m/s²)(5.1 m) cos(120°) Wn=n· Ar=nAx cos(90°) = 0 J What is the increase in thermal energy of the crate and incline? Express your answer in joules to two significant figures. ► View Available Hint(s) VE ΑΣΦ ΔΕth = |105 Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining ? 10 of 14 J Re
Your cat "Ms." (mass 7.00 kg) is trying to make it to the top of a frictionless ramp 2.00 m long and inclined upward at 30.0 ° above the horizontal. Since the poor cat can't get any traction on the ramp, you push her up the entire length of the ramp by exerting a constant 100 N force parallel to the Part A If Ms. takes a running start so that she is moving at 2.40 m/s at the bottom of the ramp, what is her speed when she reaches the top of the incline? Use the work-energy theorem. ramp. m/s
Suzie Lovtaski has a mass of 49.7 kg. She is at rest on top of a hill with a height of 92.6 m and an incline angle of 19.2 degrees. She coasts down the hill to the bottom and eventually comes to a stop; she never uses her poles to apply a force. The coefficient of friction is 0.0873 along the hill and 0.527 along the horizontal surface at the bottom. What total distance will Suzie coast (include both incline and level surface)? PSYW