Physics, 30.01.2020 08:03 chaseashley24
Agolf ball is hit off a tee at the edge of a cliff. its x and y coordinates as functions of time are given by x = 18.0t and y = 4.00t – 4.90t2, where x and y are in meters and t is in seconds. (a) write a vector expression for the ball’s position as a function of time, using the unit vectors and . by taking derivatives, obtain expressions for (b) the velocity vector as a function of time and (c) the acceleration vector as a function of time. (d) next use unit-vector notation to write expressions for the position, the velocity, and the acceleration of the golf ball at t = 3.00 s.
Answers: 2
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Describe the path of a ray that approaches a mirror parallel to the principal axis.
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Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.
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Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2
Answers: 2
Agolf ball is hit off a tee at the edge of a cliff. its x and y coordinates as functions of time are...
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