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Marsha is pushing down and to the right on a 21-kg box at an angle of 30 below horizontal. The box slides at constant velocity across a carpet whose coefficient of kinetic friction with the box is 0.70.
1. Decide the magnitude of the force exerted by Marsha on the box.
2. Decide the magnitude of the normal force exerted by the surface on the box.
3. Determine the magnitude of the friction force exerted with the surface on the box.
A 14.5 gram, 78.6 centimeter long steel guitar string is vibrating in its fourth harmonic. What is the tension on the steel guitar 'string'
A boat crosses a river with a width w=160m in which thecurrent has a uniform speed of 1.50m/s. What is the speed of the boat relative to a stationary shore observer
A lens that has a focal length of 8.90 cm is used as a magnifying glass. (a) To obtain maximum magnification and an image that can be seen clearly by a normal eye, where should the object be placed? (b) What is the magnification?
Decide the specific internal energy of 98 L of neon gas at 400°C and 2 MPa. The neon gas has a total enthalpy of 1200 kJ . Suppose that the neon gas is an ideal gas.
an object is 18cm in front of a adiverging lens that has a focal length of -12cm. how far in front of the lens should the object be placed
A coin is located 22.0 cm to the left of a converging lens (f = 16.0 cm). A second, identical lens is placed to the right of the first lens, such that the image formed by the combination has the same size and orientation as the original coin. Find th..
A 1430-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, find (a) the magnitude of the tension in the wire and..
An airplane is flying with a velocity of 81.0 m/s at an angle of 23.0 degrees above the horizontal. How far from the dog will the suitcase land in m
a bullet leaves a rifle with a muzzle velocity of 521 ms. while accelerating through the barrel of the rifle the bullet
a system has 1011 binding sites for a protein. of these sites 105 are originally filled. the system moves to a new
In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction
the roller-coaster car is dragged up at the highest point where it is released passing the highest point with speed of
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