LONCAPA 8

Najifa Ahmed - Phys 1D03 Fall 2023 1 Assignments assignment 8 0709.problem Due date: Fri Nov 10 11:59:59 pm 2023 (EST) For A = -10 i + -4 j + 4 k , B = -1 i + -10 j + 2 k , and C = 3 i + 7 j + -5 k , find C • ( A - B ). You are correct. Your receipt no. is 162-5558 sb-prob0706a.problem 1a. A 15.6kg block is dragged over a rough, horizontal surface by a 69.6N force acting at 19.9 degrees above the horizontal. The block is displaced 5.07m, and the coefficient of kinetic friction is 0.306. Find the work done by the 69.6N force. You are correct. Your receipt no. is 162-3071 1b. Find the work done by the normal force. You are correct. Your receipt no. is 162-4212 1c. What work does the gravitational force do on the block? You are correct. Your receipt no. is 162-4203 1d. How much energy is lost due to friction? You are correct. Your receipt no. is 162-2365 1e. Find the total change in the block’s kinetic energy. You are correct. Your receipt no. is 162-2880 sb-prob0714.problem 3. Calculate the scalar product of the vectors in the figure below. Assume θ 1 = 111 ◦ , θ 2 = 139 ◦ , F = 34.3N and v = 15.1cm/s. You are correct. Your receipt no. is 162-9649 sb-prob0718.problem A force F = (4.24 x i + 2.87 y j )N, where x and y are in metres, acts on an object as it moves in the x direction from the origin to x = 4.76m. Calculate the work done on the object by the force. You are correct. Your receipt no. is 162-8605 sb-prob0719a.problem 4a. When a 3.81kg mass is hung vertically on a certain light spring that obeys Hooke’s law, the spring stretches 2.02cm. If the 3.81kg mass is removed how far will the spring stretch if a 1.44kg is hung on it instead? You are correct. Your receipt no. is 162-8537 4b. How much work must an external agent do to stretch the spring 4.18cm from its unstretched position? You are correct. Your receipt no. is 162-6258 sb-prob0723.problem If it takes 3.71J of work to stretch a Hooke’s law spring 11.0cm from its unstressed length, determine the extra work required to stretch it an additional 10.0cm. Incorrect. Tries 2/10 sb-prob0769a.problem 6a. A 155g block is pressed against a spring of force constant 1.48kN/m until the block compresses the spring 11.3cm. The spring rests at the bottom of a ramp inclined at 56.2 ◦ to the horizontal. Using energy considerations, determine how far up the incline the block moves before it stops if there is no friction between the block and the ramp. You are correct. Your receipt no. is 162-1935 6b. How far up the incline does the block move before it stops if the coefficient of kinetic friction is 0.495? You are correct. Your receipt no. is 162-5107 sb-prob1046.problem A constant torque of 20.8Nm is applied to a grindstone whose moment of inertia is 0.125kg · m 2 . Using energy principles, calculate the angular speed (in revolutions per second) after the grindstone has made 12.0 revolutions. (Neglect friction.) Do not enter units. You are correct. Your receipt no. is 162-7466 sb-prob1059a.problem

Najifa Ahmed - Phys 1D03 Fall 2023 3 Assignments A long, thin uniform rod of length 1.03m and mass 3.23kg is pivoted about a horizontal, frictionless pin passing through one end. The rod is released from one end in the vertical position. At the instant the rod is horizontal, find its angular speed. You are correct. Your receipt no. is 162-3585 At the in- stant the rod is horizontal, what is its angluar acceleration? You are correct. Your receipt no. is 162-6508 At the in- stant the rod is horizontal, what is the magnitude of its x- component of acceleration at its centre of mass? You are correct. Your receipt no. is 162-6404 At the in- stant the rod is horizontal, what is the magnitude of its Y- component of acceleration at its centre of mass? You are correct. Your receipt no. is 162-2987 sb-prob1062.problem The top shown in the figure below has a moment of inertia of 3.64E-4kg · m 2 and is initially at rest. It is free to rotate about the stationary axis AA’. A string, wrapped around a peg along the axis of the top is pulled in such a manner that a constant tension of 5.34N is maintained. If the string does not slip while it is unwound from the peg, what is the angular speed of the top after 88.0cm of string has been pulled off the peg? You are correct. Your receipt no. is 162-3726 kn-prob1114a.problem A 5.88kg particle moving along the x-axis experiences the force shown, where F max = 5.07N, F min = -5.07N, d 1 = 1.28m, d 2 = 2.56m, d 3 = 3.84m, and d 4 = 5.12m. At x = 0.00m the particle’s velocity is 4.05m/s. What is its velocity at x=2.56m? You are correct. Your receipt no. is 162-5910 What is its velocity at x=5.12m? You are correct. Your receipt no. is 162-7936 kn-prob1128a.problem (10)(a) How much work does an elevator motor do to lift a 1269.0 kg elevator a height of 98.3 m? You are correct. Your receipt no. is 162-7259 (b) How much power must the motor supply to do this in 52.9 s at constant speed? You are correct. Your receipt no. is 162-9553 kn-prob1144.problem