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A child slides down a snow-covered slope on a sled. At the top of the hill, her mother gives her a push at a speed of 1.5 m/s to get her started. The frictional force acting on the sled is one-fifth of the combined weight of the sled and the child. If she travels for a distance of 23.9 m and her speed at the bottom is 2.6 m/s, compute the angle that the hill makes with the horizontal.
A charged particle of mass .0020kg is subjected to a 5.0T magnetic field that acts at a right angle to its motion. what is the magnitude of the charge on the particle
Three, 240-ohm resistors can be connected together in four different ways, making combinations of series and/or parallel circuits. what is the net resistance in each case
a bullet is fired from a gun whose barrel is 0.600 m long. the bullets mass is 5.00 g and its velocity is 300ms when
two objects are orbiting each other under the influence of the force of the gravitation force between them. object 1
A red light of wave length 6.65x10^-7 is an incident beam perpendicular to a surface of glass. n=1.65 for glass. Calculate wavelength of red light in film
A wheel rotating about a fixed axis has an angular position given by q = 3- 2.0t3, where q is measured in radians and t in seconds. What is angular acceleration of the wheel at t = 2.00s.
The focal length of a lens is inversely proportional to the quantity (n ? 1), where n is the index of refraction of the lens material. The value of n, however, depends on the wavelength of the light that passes through the lens. where will the vi..
Mechanical Advantage The pulley system shown in the figure is used to lift a 52- crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume the masses of the chains, pulley..
You are standing on a brigde that is 50.0 m above a dried up riverbed. what is the minimum spring constant that the bungee cord must have for you not to hit the riverbed
David is driving a steady 21.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.80 m/s^2 at the instant when David passes.
An LED’s color is determined by the energy needed to shift an electron across the band gap in the semiconductor from which the LED is made. Because blue photons have more energy than green photons, the development of blue LEDs has been slow. The mate..
You push on the chair with a force of = 35.0 directed at an angle of 43.0 below the horizontal and the chair slides along the floor.Using Newton's laws, compute the magnitude of the normal force that the floor exerts on the chair.
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