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You pull an 18 kilogram box across the floor with a strap that is at an angle of 39 degree above the horizontal. Determine the normal force and the tension in the strap; given that the box moves with constant speed and that the coefficient of kinetic friction between the floor and the box is 0.36.
An object is dropped from rest from a height of 3.9 107 m above the surface of the Earth. If there is no air resistance, what is its speed when it strikes the Earth
What is the minimum coefficient of friction that will prevent sliding. What should be the highest speed of the car so it can round the curve safely.
Suppose a large conducting slab is polarized (one side is positive and the other is negative) What is the electric field force (E) inside the slab
Two slits separated by a distance of d = 0.13mm are located at a distance of D = 710mm from a screen. What is the pathlength difference between the two waves from the two slits at the first (m=1) maximum on the screen
A thief was trying to pull a 20 kg coffer (a coffer is a box usually used to hold valuables) along an essentially frictionless horizontal surface. What was the work done on the coffer by the rope
A positive charge of 4.20 ?C is fixed in place. From a distance of 3.50 cm a particle of mass 6.20 g, How close to the fixed charge does the particle get before it comes to rest and starts traveling away
a sound wave traveling in 26 degrees C air has a pressure amplitude of 0.500 Pa. (assume that the density of air is 1.29 kg/m^3). What is the intensity of the wave
A set of charges are arranged in the following way: a 10.0 nC (nanocoulomb) positively charged particle sits at the origin of a coordinate system, Sketch a diagram of this charge configuration
A 972 kg car is going 20 m/s and the driver has to slam on his brakes to prevent an accident. what is the change in temperature of the brake pads and rotors
A professional race car driver buys a car that can accelerate at +5.9 m/s. Find the distance the two drivers travel before they are side by side
Use 9.81 for the magnitude of the acceleration due to gravity.
A copper rod 25 cm long having a cross-sectional area of 7.5 cm2 is used to connect a boiler maintained at 100 oC to a large block of ice at 0 oC. What is the rate of change in entropy of the ice
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