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A 55.0 kg circus performer oscillates up and down at the end of a long elastic rope at a rate of once every 8.00 s. The elastic rope obeys Hooke's Law. By how much is the rope extended beyond its u
The chair slides along the floor. Using Newton's laws, calculate n, the magnitude of the normal force that the floor exerts on the chair.
A proton traveling horizontally enters a region in which a uniform electric field is directed upward. What is the direction of the force on the proton?
what is the average force exerted on the ball by the bat? Neglect the weight of the ball, since it is so much less than the force of the bat. Choose the direction of the incoming ball as the positiv
To give a 22 kg child a ride, two teenagers pull on a 3.6 kg sled with ropes. Both teenagers pull with a force of F = 55 N at an angle of 35° relative to the forward direction, which is the dire
A typical American house requires an average 20 kW for heating. How many homes could be heated with the waste heat of this one power plant?
A car traveling on a flat (unbanked) circular track accelerates uniformly from rest with a tangential acceleration of 1.90 m/s2. The car makes it one quarter of the way around the circle before it s
Determine the diameter of the ball. The density of water is 1000 kg/m3 and the acceleration of gravity is 9.81 m/s2 . Answer in units of cm.
She enters the water, her speed is reduced to 1.10 m/s. What is the net average force (magnitude and direction) that acts on her when she is in the water
The drawing shows a boat being pulled by two locomotives through a canal of length 1.00 km. The tension in each cable is 3.00 103 N, and θ = 23.0°. What is the net work done on the boat b
A long, thin solenoid has 811 turns per meter and radius 2.5 cm. The current in the solenoid is increasing at a uniform rate of 75.9 A/s. What is the magnitude of the induced electric field 0.207 cm
Find the angles at which one would observe the first order maximum, the second order maximum, and so forth.
A single-turn current loop, carrying a current of 3.30 A, is in the shape of a right triangle with sides 50.0, 120, and 130 cm. The loop is in a uniform magnetic field of magnitude 86.0 mT whose di
An electric motor rotating a workshop grinding wheel at a rate of 111 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.00 rad/s2. (a) How long d
Water is pumped into a storage tank from a well delivering 17.0 gallons of water in 33.0 seconds through a pipe of 1.00 in.2 cross-sectional area. What is the average velocity of the water in the p
A sphere of mass 2.7 10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 41° with the vertical. Find the tension in the cord
A hiker's trip consists of three segments. Path A is 8.0 km long heading 60 degrees north of east. Path B is 7.0 km long in a direction due east. Path C is 4.0 km long heading 315 degrees countercl
The permeability of free space is 4pi x 10^-7 T m/A. What is he magnetic field at the proton due to the orbital motion of the electron?
The permeability of free space is 1.25664 x 10^-6 T m/a. Compute the magnetic field strength that this motion produces at the location of the proton.
A wooden bucket filled with water has a mass of 75 kg and is attached to a rope that is wound around a cylinder with a radius of 0.075 m. A crank with a turning radius of 0.25 m is attached to the e
4 kg object is subjected to two forces . the object is at rest at the origin at time t=0 (a) what is the object's acceleration? (b) what is its velocity at time t=3? (c) where is the object at time
An 18.8 g mass is attached to a horizontal spring with a spring constant of 8.2 N/m and released from rest with an amplitude of 25.9 cm. What is the velocity of the mass when it is halfway to the e
Four 8.0 kg spheres are located at the corners of a square of side 0.58 m. Calculate the magnitude and direction of the gravitational force exerted on one sphere by the other three.
A 191 kg crate is pulled along a level surface by an engine. The coefficient of kinetic friction between the crate and the surface is 0.619. The acceleration of gravity is 9.8 m/s2 . How much power
The jet is traveling at 45.0 m/s when the pilot recieves the message. what is the acceleration of the plane if it takes the pilot 5.00 s to brign the palne to a halt?