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Two skaters, each of mass 50 kg, approach each other along parallel paths separated by 3 m. They have equal and opposite velocities of 1.4 m/s. The first skater carries one end of a long pole with negligible mass, and the second skater grabs the other end of it as she passes; see the figure. Assume frictionless ice. Describe quantitatively the motion of the skaters after they have become connected by the pole.
What is the total kinetic energy of two-skater system?
By pulling on the pole, the skaters reduce their separation to 1.0 m. What is their angular speed then?
What is the new kinetic energy of the system after they have pulled themselves closer? Explain the source of the increase kinetic energy.
To lift a wire ring of radius 1.85 cm from the surface of a container of blood plasma, Calculate the surface tension of blood plasma
Express your answers using two significant figures. Enter the x and y coordinates of the charge separated by a comma.
A small puck of mass m=0.1kg moves in a circle of radius 0.3m on a table top; the puck is tied with a massless string to a tether at the origin. find the tension in the string at the end of one revolution
A polypropylene (pp) utility cart is absorbing RF radiation from a wifi laptop sitting on a metal stand over the cart. The polypropylene (pp) utility cart is now warm around its perimeter
What is the kinetic energy of a ball of mass 16.1 kg at the apex (highest point) of its trajectory, if it is thrown with an initial speed of 45 mph and an initial angle of 42.8 o with respect to the horizontal?
A coil of wire with 230 circular turns of radius 3 centimeter is in a uniform magnetic field along the axis of the coil. Find at what rate must magnetic field be changing to induce a current of 0.152 Amp in the coil
Light of intensity 2.5W/m2 passes through the pupil of one of your eyes and eventually falls on your retina. The radius of the pupil is controlled by the iris.
A ball is launched straight up with a speed of 25.27 miles per hour. What is the maximum height reached in meters
A 1.30-kg ball, moving to the right at a velocity of +4.52 m/s on a frictionless table, collides head-on with a stationary 8.40-kg ball. Find the magnitude and direction of the final velocity of the two balls if the collision is completely inelastic
In mid-nineteenth century England horses were often used to pull barges along canals. What is the average power
Two particles are fixed on an x axis. Particle 1 of charge 46.4 μC is located at x = -34.2 cm; particle 2 of charge Q is located at x = 29.3 cm. Particle 3 of charge magnitude 40.5 μC is released from rest on the y axis at y = 34.2 cm. What is the va..
1. the magnetic domains that become aligned in the iron core contribute to the overall magnetic field of the coil and
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