Physics, 12.07.2019 21:10, lindsaypre0644
Achild rides a merry-go-around while turning with uniform circular motion. at time t 2 s, the child's velocity is vi = (4.5 m/s)î+ (4 m/s)j, measured on a horizontal xy coordinate system. at time t2 7s, a half-revolution later, the child's velocity is v(-4.5 m/s)î + (-4 m/s)j (a) what is the magnitude of the child's average acceleration during the time interval t2-t? (b) what is the child's centripetal acceleration (magnitude of the child's radial acceleration) during the time interval t2 t? (c) what is the child's radial acceleration vector (using î andj) at t2? at time t2, the merry-go-round begins to slow down, coming to a complete stop just as it completes two full rotations after t2- during this time, the child experiences a constant tangential acceleration. (d) what is the magnitude of the child's tangential acceleration during the time it takes the merry-go-round to come to a complete stop?
Answers: 2
Physics, 22.06.2019 12:30, olsen6932
As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?
Answers: 1
Achild rides a merry-go-around while turning with uniform circular motion. at time t 2 s, the child'...
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