1. A circular disk of radius 30 cm is rotating with an angular acceleration of 1 radian/ s2. What is the tangential acceleration of a point on the rim of the disk? What is its centripetal acceleration if the angular speed is 3 rev / s? 2. A 980 Kg car traveling at 20 m/s rounds a curve of radius 40 m. What is the friction f
A cannon, located 60.0m from the base of a vertical 25.0m tall cliff, shoots a 15kg shell at 43.0 digress above the horizontal toward the cliff. 1). What must the minimum muzzle velocity be for the shell to clear the top of the cliff? 2) The ground at the top of the cliff is level, with a constant elevation of 25.0m
You are driving north on a highway. Then, without changing speed, you round a curve and drive east. a) Does your velocity change? b) Do you accelerate? Explain
Physics: Acceleration, order of magnitude calculations, velocity vector, initial velocity, Newton's first law, constant velocity
A helium-filled balloon for a birthday party is being brought home in a car. As the car accelerates away from a stoplight, in which direction does the balloon move relative to the car? Explain. Estimate how many 20 cm x 20 cm tiles it would take to tile the floor and three sides of a shower stall. The stall has a square floor
A 0.500-kg mass on a spring has velocity as a function of time given by: Vx(t)=(3.60 cm/s)*sin[(4.71s^(-1))*t-Pi/2] A) What is the period of the mass in s? B) What is the amplitude of the mass in cm? C) What is the maximum acceleration of the mass in cm/s^2?
6.) An airplane flies due south with respect to the ground at an air speed of 900 km/h for 2.0 hr before turning and moving southwest with respect to the ground for 3.0 hr. During the entire trip, a wind blows in the easterly direction at 120 km/h. (a) What is the plane's average speed with respect to the ground? (b) What is the
An 85-kg jogger is heading due east at a speed of 2.0 m/s. A 55-kg jogger is heading 32° north of east at a speed of 3.0 m/s. Find the magnitude and direction of the sum of the momenta of the two joggers.
A ball was thrown upward with a velocity u. What is the maximum height that the ball reaches? What is the final velocity of the ball when it hits the ground? Is it same as the initial velocity? Assume that the air resistance is NOT negligible.
A wheel starts from rest and rotates about its axis with constant angular acceleration. After 6.8 seconds have elapsed, it has rotated through an angle of 25 radians. A) What is the angular acceleration of the wheel? B) What is the angular velocity when the time t = 6.8 seconds? C) What is the centripetal acceleration of
Two billiard balls travel towards each other along a straight line with the same speed. What are their speeds and directions after an elastic collision? I need to see each step and formula to solve this question.
2. A nonuniform wire of length L and mass M has a variable linear mass density given by mu = kx where x is the distance from one end of the wire and k is a constant. (a) Show that M = (kL^2)/2. (b) Show that the time t required for a pulse generated at one end of the wire to travel to the other end is given by t = sqrt(8ML
(See attached file for full problem description) --- Learning Goal: To derive the formulas for the major characteristics of motion as functions of time for a horizontal spring oscillator and to practice using the obtained formulas by answering some basic questions. A block of mass m is attached to a spring whose spring cons
Please help answer the following questions. Provide step by step calculations for each. It has been argued that power plants should make use of off-peak hours (such as late at night) to generate mechanical energy and store it until it is needed during peak load times, such as the middle of the day. One suggestion has been to
* degree mode Please view attachment 10. Two circus elephants, Bessie and Maybelle, are dragging a large container, as shown below. If Bessie pulls with a force of 2200 lbs. and Maybelle with a force of 1500 lbs, and the container moves along the dashed line, what is the angle? The container is behind both Bessie and Mayb
Merry-Go-Round. Two identical twins, Jena and Jackie, are playing one December on a large merry-go-round (a disk mounted parallel to the ground on a vertical axle through its center) in their school playground in northern Minnesota. Each twin has a mass of m. The icy coating on the merry-go-round surface makes it frictionless. T
On the center photo of page 43 measure the distance between the two images nearest the 20 cm position of the larger, heavier ball on the left. Use bottom to bottom measurements as shown in a previous figure. Repeat for the two images nearest the bottom left of the photo on page 43. Scale these distances to actual displacement
If a pitcher threw a ball horizontally at 101.0 mph, how far would it fall vertically by the time it reached home plate, 60.5 ft away? A daredevil jumps a canyon with walls of equal height and 10 m apart. He takes off by driving a motorcycle off a short ramp sloped at an angle of 15 degrees. What minimum speed must he have in
A dockworker applies a constant horizontal force of 80.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 11.0 m in 5.00 s. a) What is the mass of the block of ice? b) If the worker stops pushing at the end of 5.00 s, how far does the block move in th
A hospital patient receives a quick 500-cc blood transfusion through a needle with a length of 5.0 cm and an inner diameter of 1.0 mm. if the blood bag is suspended 0.85 m above the height where the blood first starts to flow into the vein, how long does the transfusion take? (Neglect the viscosity of the blood flowing in the pl
(See attached file for full problem description with symbols and diagrams) --- Consider a string of total length , made up of three segments of equal length. The mass per unit length of the first segment is , that of the second is , and that of the third . The third segment is tied to a wall, and the string is stretched by
In a race over a distance s, runner A starts from rest and accelerates at a1 for the first distance x and then runs at constant speed. Runner B starts from rest and accelerates at a2 for the first distance x and then runs at constant speed. Runner A begins running as soon as the race begins but B first takes a nap to rest up.
Please help with the following problem, there are 2 more parts but I cannot send them until I have to answer to part A, thanks. Standing Waves in Action Consider a string of length 1.0 meter, fixed at both ends, with mass 100 grams and tension 1.0 newtons. Give the number of nodes and antinodes set up on the string if i
1) A plane flies 485 km away from its base at 708 m/s, then flies back to its base at 1062 m/s. What is the average speed in m/s? 2) See attachment and solve problems 15 - 17.
Kinematics: Velocity of a car driving 7 hours at 46km/h then 7 hours at 69km/h, Recon plane, and Electron in a TV.
Please use step by step solutions with answers and show equations used. Please show every step no matter how minor please. 1)You drive a car 7 hours at 46kmh then 7 hours at 69kmh. What is your average velocity? Answer in km/h. 2) What is your average velocity if you drive a distance of 402.5 km at a speed of 46 km/h, t
A liquid flows through two horizontal sections of tubing joined end to end. The cross sectional area, flow speed and pressure in the first tubing is given. The cross sectional area of the second tubing is given. To calculate the flow speed and pressure in the smaller section.
A liquid with a density of 1.37*10^3 kg/m^3 flows through two horizontal sections of tubing joined end to end. In the first section, the cross sectional area is 10.4cm^2, the flow speed is 276cm/sec, and the pressure is 1.42*10^5 Pa. In the second section, the cross sectional area is 2.71cm^2. a) Calculate the flow speed in
How long is the electron in the accelerating region? Answer in units of s. A rocket driven sled running on a straight level track has been used to study the physiological effects of large accelerations on astronauts. One such sled can attain a speed of 408m/s in a 1.6 starting from rest. What is the acceleration of the sled,
Please help to explain the following graphs & questions in attachment. An object of mass is attached to a vertically oriented spring. The object is pulled a short distance below its equilibrium position and released from rest. Set the origin of the coordinate system at the equilibrium position of the object and choose upward
(See attached file for full problem description) On quiz 2 below please explain 1-5 better and 7 - 10 better, specifically, what equations are used to solve each question, how are the numbers and equations worked out to see better. Please do the same for quiz 3 for problems 1-7. See everything below this page and the n
Energy/Motion problems 4. A 10-kg box is pushed by from rest by a 100-Newton force at a 30 degree angle downward with respect to the horizontal. The coefficient of friction between the box and the floor is 0.35. Determine the box's velocity (in meters/second to two decimal places) after the box has been moved through a distan
The coordinates of a bird flying in the XY-plane are given by x(t)=at and y(t) = 3.0 m - Bt^2, where a = 2.4m/s and B = 1.2m/s2. Calculate the velocity and acceleration vectors of the bird as functions of time.