Explore BrainMass
Share

# Velocity

### Toy Cars: Velocity, position, and acceleration

At t = 0, one toy car is set rolling on a straight track with initial position 13.0 cm, initial velocity -3.5 cm/s, and constant acceleration 2.50 cm/(s^2). At the same moment, another toy car is set rolling on an adjacent track with initial position 10.5 cm, an initial velocity of 6.10 cm/s, and constant zero acceleration. (a)

### 4 Problems: Vectors, Displacement and equations of motion.

Please see the attached file for full problem description. 1.) A basketball player runs down the court, following the path indicated by the vectors A, B, and C in Figure 3-38. The magnitudes of these three vectors are: A = 10.0 m, B = 21.0 m, and C = 7.0 m. Let the +x axis point to the right and the +y axis point to the far s

### The wavelength and phase speed of microwaves

Determine the wavelength and phase speed of microwaves of frequency 2.45GHz (i) in a vacuum, (ii) in two different plasmas in which there is a uniform distribution of electrons with different number density.

### Child's speed

A child in an airport is able to cover 348 meters in 4 minutes running at a steady speed down a moving sidewalk in the direction of the sidewalks motion. Running a the same speed in the direction opposite to the sidewalks movement, the child is able to cover 275 meters in 5 minutes. What is the child's running speed on a still s

### Physics - Pressure and Volume

1. Calculate the following. a. 100 ml of liquid A has a mass of 250 g. What is its density, in kg/L? (Note: 1 L = 1000 ml = 0.001 m3) b. Liquid B has a specific gravity of 0.98. How much does 1 L weigh, in an Earth-standard gravitational field? 2. The pipe shown above expands from an internal diameter of 3 cm to an

### Projectile Motion: Projected from hight h horizontally

A ball projected horizontally from a height of 50 ft. hits ground at a distance of 100 ft measured from the foot of the vertical structure. Find the velocity of projection.

### A) A projectile is fired straight up at a speed of v0 at a latitude of (alpha) degrees. Show that in the time the projectile is airborne, it is deflected a distance of 4 v0*3 cos(alpha)/3 g^2 to the west. c) Show that for objects confined to land or for objects in which their net vertical acceleration is small in the inertial reference frame, such as storm systems, the maximum magnitude of the Coriolis force is at the north pole with a maximum magnitude of 2m* (Omega0)* v0, where v0 is the object's speed in the east-north direction, or another words along the ground. Thus, show even for fast moving objects with speeds of say 100 m/s, the ratio of the Coriolis acceleration=to that of g is approximately 0.15 percent.

A) A projectile is fired straight up at a speed of v0 at a latitude of (alpha) degrees. Show that in the time the projectile is airborne, it is deflected a distance of 4 v0*3 cos(alpha)/3 g^2 to the west. c) Show that for objects confined to land or for objects in which their net vertical acceleration is small in the inertia

### Conceptual questions/problems on kinematics

Please solve only the circled problems : Questions 3, 10, 12, 15, Exercises 1, 8, 10, Problem 4 (please see the attachment).

### velocity and acceleration..

4.) A car has an average speed of 80.0 km/h for one hour, then an average speed of 90.0 km/h for two hours during a three-hour trip What was the average speed for the three-hour trip? 5.) What is the acceleration of a car that moves from a speed of 5.0 m/s to a speed of 15m/s during a time of 6.0 s? 10.) An archer shoots a

### Displacement vs Time and Velocity vs Time

Hi, I need assistance on this one problem. I need all work shown to understand. The distance between windowsills I am confused about. See attachment for diagram: Please apply the techniques used in Lab 3 (particularly the ticker tape) to the following photo: Distance between windowsills is 3.15 meters. Three photographs

### Magnetic Force and Magnetic Fields

A uniform magnetic field of magnitude B=1.2 teslas is directed toward the bottom of the page in the -y direction. At time t=0, a proton p in the field is moving in the plane of the page with a speed v=4 x 10^7 meters per second in a direction 30 degrees above the +x axis. a.) Calculate the magnetic force on the proton at t=0

### Displacement - Time Graph (Physics Lab)

Run a simulation. You will use the data from the "Time" and "Position" measurement tables to fill in the data table below at the indicated times. Then graph the data on the graph paper provided (Lab Answer Sheet) in order to construct a d-t or x-t graph. Calculate the average velocity, vavg, for the whole trip. Calculate the ins

### Amplitude and Wave Speed of the Standing Wave

A guitar string is vibrating in its fundamental mode, with nodes at each end. The length of the segment of the string that is free to vibrate is 0.380 m. The maximum transverse acceleration of a point at the middle of the segment is 8800 m/s^2 and the maximum transverse velocity is 3.50 m/s. a) What is the amplitude of this s

### Breaking a Glass Soda Bottle

A glass soda bottle is emptied of soda and filled to the very top with water. A cork is carefully fitted into the top of the bottle, leaving no air between the cork and the water. The top of the bottle has a diameter of D_top = 2.00 cm and the bottom of the bottle has a diameter of D_bot = 6.50 cm. The glass breaks when it is ex

### Torricelli's Theorem

Water stands at a depth H in a large open tank whose side walls are vertical (see attachment for figure). A hole is made in one of the walls at a depth h below the water surface. a) At what distance R from the foot of the wall does the emerging stream strike the floor? Express your answer in terms of the given quantities.

### momentum and impulse

Please see attachment. Thank You your help is greatly needed. 1. A stunt person jumps from the roof of a tall building, but no injury occurs because the person lands on a large, air-filled bag. Which one of the following best describes why no injury occurs? 2. Jennifer is walking at 1.63 m/s. If Jennifer weighs 583 N, what

### Birefringent Materials Optic Axis

What is meant by the optic axis of a uniaxial birefringent crystal? Could you please describe and explain how birefringent materials may be used to produce linearly and circularly polarized light from unpolarized light? Thank you.

### Projectile motion

Please see the attached file. 1. A rocket is launched at an angle of 53.0° above the horizontal with an initial speed of 100 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 30.0 m/s2. At this time, its engines fail and the rocket proceeds to move as a projectile. Find (a) the max

### wind velocity

A jetliner with an airspeed of 1000 km/h sets out on a 1500-km flight due south. to maintain a southward direction, however, the plane must be pointed 15 degree west of south. if the flight taks 100 min, what is the wind velocity?

### velocity of the roller coaster

A 350 roller coaster starts from rest at point A and slides down the frictionless loop, which is shown in the accompanying figure (see attachment) How fast is this roller coaster moving at point B? v = ? m/s How hard does it press against the track at point B? F = ? N

### Maxwell velocity distribution for a gas

Please see attached file. 1. For a gas obeying the Maxwell velocity distribution obtain: a) The most probable speed of the particles b) The most probable Kinetic Energy of the particles c) The mean speed of the particles d) The root mean squared speed of the particles the mean kinetic energy of the particles 2. For a

### Flywheel Kinematics

A heavy flywheel is accelerated (rotationally) by a motor that provides constant torque and therefore a constant angular acceleration alpha. The flywheel is assumed to be stationary at time t = 0 in Parts A, B, and C of this problem. a). Find the time t_10 it takes to accelerate the flywheel to 10.0 rps (revolutions per secon

### Spring and Projectile of a thrown ball

A child's toy consists of a block that attaches to a table with a suction cup, a spring connected to that block, a ball, and a launching ramp. The spring has a spring constant, k, the ball has a mass, m , and the ramp rises a height, y, above the surface of the table, the surface of which is a height, H, above the ground. Initia

### Physics Problem: Displacement, Velocity and Acceleration

Run a simulation of a ball dropping and measure the displacement, velocity and acceleration. 1. Measure the time that it takes the ball to travel 1 meter, 2 meters, 3 meters and each succeeding meter up to 6 meters for the Earth and the Moon. 2. Graph the distance traveled versus the time for the Earth and the Moon. 3

### Impact of Velocity Reversal

Please include FBD. A 3 kg slider, A, fits loosely in a in the smooth 45 degree slot in the disk shown, which rotates in a Horizontal plane about the center O. If A is held in position by a cord secured to B determine ,T, the tension in the cord fpr a constant rotational velocity of 300 rev./min, around point O in the direct

### Angular Displacement and Motion

1. The angular displacement of a human centrifuge, of length 30 ft, is given by (theta)= 4[t + 30*e^(-.03t)-30]radians where t is in seconds and and t=0 is start up. If the passenger loses consciousness at an acceleration of 10g's determine the time this would occur. Verify the tangential acceleration is small compared to

### velocity, acceleration, distance motion

Hello I need help with the following Physics problems. 9. A train approaches a small town with a constant velocity of +28.6 m/s. The operator applies the brake, reducing the train's velocity to +11.4 m/s. If the average acceleration of the train during brake is -1.35 m/s^2. For what elapsed time does the operator apply the br

### Determining Magnitude of Velocity and Acceleration

See the attached file for diagram. The fixed horizontal guide carries a pin P whose motion is controlled by the rotating slotted arm OA. If the arm is revolving about O at the constant rate of 2 radians/sec (angular velocity)for the for the interval allowed by the horizontal guide determine the magnitudes of the velocity an

### Simple harmonic motion: Position velocity and period

A raft is bobbing up and down in a lake. Its vertical position x above the flat surface of the water is given by x=0.60sin(3.0t+4.2), where distances are in metres and time t is in seconds. 1. What is the boat's position at t=0? At t=2.8s? 2. What is the period of the raft's oscillation? 3. What is the boat's maximum sp

### Solid mechanics with a positive reference

See attached 1. A 2-lb ball is thrown upward at 30ft/s from an origin 5-ft above the earth's surface. Using for your positive reference a vertical Y axis with its origin at 5ft, DETERMINE FOR THE BALL: a) The maximum height in ft reached b) The elapsed time of flight in seconds until its return to the origin c) Its a