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Answer the following question, include free body diagrams and state any formulas used
A block of mass 35 kg is on a flat floor with a static friction coefficient of 0.36 and a kinetic friction coefficient of 0.29. A person attempts to slide the box from rest in a forward direction. Find the maximum frictional force experienced and the acceleration of the box once it is moving if:
a) the person pushes horizontally with 120 N.
b) the person pushes at an angle with a 25 N vertical component directed down and a 200 N horizontal component of the push directed forward.
c) the person pulls with 120 N on a rope up angled 30° up from the horizontal.
A laser with wavelength d/8 is shining light on a double slit with slit separation 0.3 {rm mm}. This results in an interference pattern on the screen a distance L away from the slits. We wish to shine a second laser, with a different wavelength, t..
An astronaut on the Moon wants to create a pendulum that will have the same period. Knowing the Moon's gravity is about 1/6th of Earth's, will the astronaut's pendulum have a longer or shorter string? What would be the length of the string?
the motor in a refrigerator has power p. if the freezing compartment is at temperature tl and the outside air is at
Explain the definition and give an example of both direct and indirect Solar Power. In a brief introduction please.
A 3.5-kip force P is applied at point D of the cast-iron post shown. Replace that force with an equivalent force-couple system at the center A of the base section. (Round the final answer to two decimal places.)
A 1.00-kg glider attached to a spring with a force constant 16.0 N/m oscillates on a frictionless, horizontal air track. Find the period of the glider's motion
The electric potential between two parallel plates is given by V(x) = (8.0 V/m)*x + 5.0 V, with x=0 taken at one of the plates and x positive in the direction toward the other plate. What is the charge density on the plates
The second-order dark fringe in a single-slit diffraction pattern is 1.40 mm from the center of the central maximum. Calculate the wavelength of the incident light
A horizontal force of 50 N pushes a box that weighs 75 N across the floor at a constant speed. What is the power generated by the applied force if it takes 30 seconds to push the box 12 meters
In a classroom demonstration, a 79.2-kg physics professor lies on a "bed of nails." what is the average pressure at each contact
The rolling resistance for steel on steel is quite low; the coefficient of rolling friction is typically r=0.002. How far will the locomotive move during this time
q1. a roller-coaster track has six semicircular dips with different radii of curvature. the similar roller-coaster cart
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