Part f - example: finding two forces (part i)
two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction μs=0.3. four forces act on it:
(a) the applied force f (directed θ=30∘ above the horizontal).
(b) the force of gravity fg=mg (directly down, where g=9.8m/s2).
(c) the normal force n (directly up).
(d)the force of static friction fs (directly left, opposing any potential motion).
if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=μsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as:
fcosθ−μsn=0
fsinθ+n−mg=0
in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, θ, and μs (no n)
for the situation in part f, find the magnitude of the force f (in kg⋅m/s2) necessary to make the block move
Answers: 3
Physics, 22.06.2019 08:30, ljwatts25
Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave
Answers: 1
Physics, 22.06.2019 08:40, kayleewoodard
Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?
Answers: 1
Physics, 22.06.2019 16:00, postorivofarms
The process of predicting values that extend beyond the range of data points is called absolute value extrapolation interpolation prediction for any given: )
Answers: 2
Part f - example: finding two forces (part i)
two dimensional dynamics often involves solving...
two dimensional dynamics often involves solving...
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