Explore BrainMass
Share

Acceleration

Free-body diagram, Acceleration of the system, Tension

Please show your work clearly as I need to understand the solution well. Two blocks are connected by a light rope. An upward force of 220 N is applied upward on the upper block as shown in the attachment. a. Draw a free-body diagram for each block indicating all forces exerted. b. What is the acceleration of the system?

Acceleration of Object Rolling Down an Incline

1. Assume you are walking in front of a motion sensor that graphs the distance you have walked (y axis) against time (x axis). Describe the motion that you need to make to produce the following graphs: a) Line with a positive slope. b) Line with steeper positive slope. c) Line with negative slope. d) Line with zero slope.

Simple Harmonic Motion: Pendulum in a circulating car.

88. A simple pendulum of length 20 cm and mass 5.0 g is suspended in a race car traveling with constant speed 70 m/s around a circle of radius 50 m. If the pendulum undergoes small oscillations in a radial direction about its equilibrium position, what is the frequency of oscillation?

Mechanics: Magnitude of a buoyant force on the sphere

Problem 93 A 7.49 kg sphere of radius 5.25 cm is at a depth of 2.20 km in seawater that has an average density of 1025 kg/m3. What are the (a) gauge pressure, (b) total pressure, and (c) corresponding total force compressing the sphere's surface? What are (d) the magnitude of the buoyant force on the sphere and (e) the magnit

Magnitude of Acceleration and Final Speed of Car

What is the magnitude of the acceleration that this force5.0 x 10³ N will cause when applied to a car with a mass of 1.1x10³Kg Then calculate the final speed of the car (above) assuming that it was standing still initially and that the force of 5.0 x 10³ N is applied for 6.0s Why would the car take longer to reach the c

Velocity, Acceleration and Force

1. A body with initial velocity 8.0 m/s moves along a straight line with constant acceleration and travels 640 m in 40 s. For the 40 s interval, find (a) the average velocity, (b) the final velocity, and (c) the acceleration. 2. A mass of 10 kg is hanging from a spring scale that is in turn hanging from a hook attached to the

speed as a function of time

Please see attached file. An object is released from rest at time t = 0 and falls through the air, which exerts a resistive force such that the acceleration a of the object is given by a = g -bv, where v is the object's speed and b is a constant. If limiting cases for large and small values of t are considered, which of the f

Acceleration and Direction of 10N Forces on Ropes

See attached file. Five 10-N forces (represented by arrows in the figure - see attached doc.) act on ropes connected to an iron ring in the directions shown. Will the ring experience acceleration? If so, in what direction will it accelerate? Explain.

Laws of Motion: Susie is roller-blading.

Please provide a detailed step by step solution and explanation to this problem. Suzie (50kg) is roller-blading down the sidewalk going 20 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 0.5 seconds. a) What is Suzie's average acceler

Laws of Motion: John pushes a wheelbarrow

Please provide a detailed step by step solution. ) John pushes a loaded wheelbarrow, which is initially at rest, with a constant horizontal force of 10 newtons. The mass of the wheelbarrow is 15 kg. Neglect friction forces. a) What is the constant acceleration of the wheelbarrow? b) If John pushes the wheelbarrow for

Laws of Motion: Determining Acceleration, Speed and Force

Please provide a step by step solution to the following problem. Tracy (50 kg) and Tom (75 kg) are standing at rest in the middle of the roller rink, facing each other, free to move. Tracy pushes off Tom with her hands and remains in contact with Tom's hands, applying a constant force for 0.75 seconds. Tracy moves 0.5 meter

Data needed for a pendulum experiment: Example problem

I'm trying to conduct a pendulum experiment. I think we need to use the angular acceleration and take the second derivative of the arc length? Also, what other calculations should I take into consideration for this specific experiment. Without, doing the experiment what kind of data what I come up with?

Acceleration and Velocity of a Particle

1. A particle oscillates between the points x = 40 mm and x = 160 mm with an acceleration a = k( 100 - x), where a and x are expressed in mm/ s^2 and mm, respectively, and k is a constant. The velocity of the particle is 18 mm/ s when x = 100 mm and is zero at both x = 40 mm and x = 160 mm. Determine (a) the value of k,( b) the

Motion: Average speed and acceleration

Secretariat ran the Kentucky Derby with times of 25.4 s, 24.3 s, 23.1 s, and 22.8 s, for the quarter mile. (a) Find his average speed during each quarter-mile segment. first segment -------- ft/s second segment -------- ft/s third segment -------- ft/s fourth segment -------- ft/s (b) Assuming that Secretaria

Electron Speed and Acceleration in an Electric Field

An electron is accelerated by a constant electric field of magnitude 332 N/C. (A) Calculate the acceleration of the electron. (B) Use the equations of motion with constant acceleration to find the electron's speed after 1.08E-8 s, assuming it starts from rest.

Electromagnet, magnetic force, positive ion, parallel wire, coil

A laboratory electromagnet produces a magnetic field of magnitude 1.50 T. A proton moves through this field with a speed of 6.00 x 10^6 m/s. (a) Find the magnitude of the maximum magnetic force that could be exerted on the proton. (b) What is the magnitude of the maximum acceleration of the proton? (c) Would the field exert the

Physics cathode ray tube

In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.35 x 10&#8722;17 N during the first 2.04 cm of tube's length; then they move at essentially constant velocity another 44.1 cm before hitting the screen. How long does it take them to travel the length of the tube? Please use

Physics of a carnival ride

The carnival ride has a 2.5 m radius and rotates once each 1.80 s. (a) Find the speed of a rider. m/s (b) Find the centripetal acceleration of a rider. m/s2 (c) What produces this acceleration? force of gravity force of the drum walls inertia centrifugal force (d) What minimum coefficient of static

Weight on Different Planets

Suppose that you traveled to a planet with 4 times the mass and 4 times the diameter of the earth. Would you weigh more or less on that planet than on earth? By what factor?

Physics: Inclined Plane

Question: A 2.3 kg block slides down a 25° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity is 0.60 m/s. The incline is 1.6 m long. (a) What is the acceleration of the block? ______m/s^2 (b) What is the coefficient of friction?

Mechanics

1. In chronological order, what happens to the kinetic, potential, and total energy of the cart for one half cycle. The half cycle starts just after you have pushed the cart. The half cycle finishes just when the cart stops at the height of its motion. Remember, this is about the cart's mechanical energy. A. Kinetic goes fro

Physics: Magnitude of force, acceleration, rope tension, object on moving elevator

For the following questions, the answers are given but I need the workings to arrive at the answer. 1. A force acts on a 1.5 kg, mass, giving it an acceleration of 3.0 m/s^2. (a) If the same force acts on a 2.5 kg mass, what acceleration would be produced? (b) What is the magnitude of force? Answer: (a) 1.8m/s^2 (b) 4.5 N

Circular Motion

1. Centrifuges are commonly used in biological laboratories for the isolation and maintenance of cell preparations. For cell separation, assume centrifugation conditions that are 1.00 x 103 rpm using an 8.31-cm-radius rotor. What is the radial acceleration of material in the centrifuge under these conditions? Express your answer

Instantaneous and Average speeds and Average acceleration.

A runner is jogging at a steady velocity of 3.3 km/hr. When the runner is at 8.6Km from the finishing line, a bird begins flying from the runner to the finishing line at 13.2 km/hr. When the bird reaches the finish line, it returns around and flies back to the runner. How far does the bird travel? Answer in units of Km..... and

Acceleration & Velocity

1. Balls A, B, and C all start at the same height above the ground. Ball A is dropped. Ball B is thrown horizonatally to the right at 5 m/s. Ball C is thrown horizontally to the left at 15 m/s. What is the order that they hit ground and why? 2. Explain why, when traveling in a circle, the acceleration is toward the center of

Cash receipts acceleration system

Peggy Pierce Designs Inc. is a vertically integrated, national manufacturer and retailer of women's clothing. Currently, the firm has no coordinated cas management system. A proposal, however, from the first Pennsylvania Bank aimed at speeding up cash collections is being examined by several of Pierce's corproate executives.

Motion of a Top

See the attached file. The motion of the top is such that at the instant shown it is rotating about the z axis at w1 = 0.6 rad/s, while it is spinning at w2 = 8 rad/s. Determine the angular velocity and angular acceleration of the top at this instant. Express the result as a Cartesian vector.

Harmonic Oscillator Frequency of Motion

The acceleration of a block attached to a spring is given by a = -(0.307 m/s2) cos([2.09 rad/s]t.) (a) What is the frequency of the block's motion? _____Hz (b) What is the maximum speed of the block? _____m/s (c) What is the amplitude of the block's motion? _____m

Constant angular acceleration

A flywheel has a mass of 100 kg and a radius of gyration of 150 mm. It is accelerated from 100 rev/min to 250 rev/min at a constant rate in 15 s. Calculate: i) the total energy required to produce the acceleration ii) the power required at the start and end of the period of acceleration

Two pulley system supporting two masses; one sliding on a rough surface and the other hanging. The system is released from rest. To determine the linear acceleration of the sliding mass. Block A weighs 25 lbs and it slides on a surface with a coefficient of friction 0.30. Block B weighs 7 lbs. The cable does not slip on eithe