College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- Problem Statement: An object of mass M is connected to an object of mass m by a massless string resting over a massless, frictionless pulley. Mass M accelerates on the frictionless surface to the right. M a. Choose an appropriate coordinate system (s) and draw free body diagram(s). Make a table of known/given information and unknown/wanted information. List any physical assumptions you are using to solve the problem. b. Write down Newton's Second Law for both block m and block M. c. What is the acceleration constraint for the two blocks? Massless string Massless, fric- tionless pulley m d. Find a symbolic expression for the acceleration of both blocks M and m. e. Assess the validity of your solutions in the following ways: 1) Check the physical units of your expression for the acceleration for the two blocks. 2) Consider the situation where m = 0. What do you expect the acceleration of block M to be? Does your solution from part d match your expectations in this situation? Consider the…arrow_forwardA rifle fires a 10-g bullet with a horizontal speed of 300 m/s . The bullet strikes a block of wood and the bullet penetrates to a depth of 12 cm into the wood before coming to a stop. 1. Draw the motion and force diagrams for the bullet while it is coming to a stop. ignore the weight vector . 2. What resistive force (assumed to be constant) does the wood exert on the bullet? 3. How many seconds does it take the bullet to come to rest?arrow_forwardHi there, I need some help on drawing this free body diagram for this scenario. I do know that normal force, weight, drag, and kinetic friction forces are the ones that are acting in this scenario. I just can't seem to get the diagram drawn correctly, supposing the car is moving to the right. Scenario: Your car is skidding to a stop from a high speed. Thank you!arrow_forward
- A jet with mass m = 1.3 x 105 kg jet accelerates down the runway for takeoff at 1.5 m/s². 1) What is the net horizontal force on the airplane as it accelerates for takeoff? 195000 N Submit 2) What is the net vertical force on the airplane as it accelerates for takeoff? N Submit 123500 4) What is the net vertical force on the airplane as it climbs upward? 3) Once off the ground, the plane climbs upward for 20 seconds. During this time, the vertical speed increases from zero to 19 m/s, while the horizontal speed increases from 80 m/s to 92 m/s. What is the net horizontal force on the airplane as it climbs upward? 78000 N Submit N Submit + 6) What is the net vertical force on the airplane as it levels off? + N Submit + 5) After reaching cruising altitude, the plane levels off, keeping the horizontal speed constant, but smoothly reducing the vertical speed to zero, in 14 seconds. What is the net horizontal force on the airplane as it levels off? 0 N Submit + + +arrow_forwardAn object of mass m is subject to a drag force with magnitude |D| = kv", where k is a positive constant, v is the velocity, and n is a constant integer. The object starts at the origin with initial velocity vo in the positive x-direction. There are no other forces acting on the object. a) What is the equation of motion for this system?. b) What is the velocity of the object as a function of time? c) What is the maximum distance the particle will travel before stopping? (Hint: find the velocity as a function of position).arrow_forwardPlease follow the instructions carefully and provide detailed answers. Answer only if you really know how to compute it. Thank you so much!arrow_forward
- THANKSarrow_forwardThe same 2.0 kg box is then pulled up a 30° inclined surface, at constant velocity, by a 12.0Napplied force.Q1. Construct a free-body diagram for the box as it is pulled up the incline. Q2. Determine the magnitude of the kinetic friction force and the corresponding coefficient ofkinetic friction.arrow_forward1. An evacuated tube uses an accelerating voltage of 45 kV to accelerate electrons to hit a copper plate and produce x-rays. (a) Calculate the work done in accelerating a single electron through this potential difference. W = J (b) Calculate the change in PE of a single electron through this potential difference. ΔΡΕ Jarrow_forward
- b. A block of mass m is placed at rest on an inclined plane as shown below. The plane is frictionless and makes the angle with the horizontal as shown. If another force of magnitude P is applied to the block at the known angle as shown, draw the free body diagram for the block and determine what the value of P must be if the block is to remain at rest. Parrow_forwardThe fastest pitched baseball was clocked at 47 m/sec. If the pitcher exerted his force (assumed to be horizontal and constant) over a distance of 1.0m, and a baseball has a mass of 145 grams, a) Draw a free-body diagram of the ball during the pitch. b) What force did the pitcher exert on the ball during this record-setting pitch? c) Estimate the force in part b as a fraction of the pitcher’s weight. You will have to make a reasonable guess at the mass of a baseball pitcher.arrow_forwardWhich of the following is true? a. Earth exerts a force due to gravity on your body, and your body exerts a smaller force on the Earth, because your mass is smaller than the mass of the Earth. b. The Moon orbits the Earth because the Earth exerts a force on the Moon and the Moon exerts a force equal in magnitude and direction on the Earth. c. A rocket taking off exerts a force on the Earth equal to the force the Earth exerts on the rocket. d. An airplane cruising at a constant speed is not affected by gravity.arrow_forward
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