Physics

Physics, 28.07.2019 18:00, zahriamarie10

The force needed to hold a particular spring compressed an amount x from its normal length is given by f = kx + 2ax3 + bx5. how much work must be done to compress it by an amount x, starting from x = 0? (answer in terms of a, b, k, and x, as necessary.)

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Physics, 26.06.2019 00:10, shauntleaning

Aspring gun is made by compressing a spring in a tube and then latching the spring at the compressed position. a 4.97-g pellet is placed against the compressed and latched spring. the spring latches at a compression of 4.73 cm, and it takes a force of 9.12 n to compress the spring to that point. (note: while the spring is being compressed the ball is not in contact with the spring.) if the gun is fired vertically, how fast is the pellet moving when it loses contact with the spring? (include the effect of gravity and assume that the pellet leaves the spring when the spring is back to its relaxed length.)

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Physics, 27.09.2019 01:30, brethan

Aspring gun is made by compressing a spring in a tube and then latching the spring at the compressed position. a 4.97-g pellet is placed against the compressed and latched spring. the spring latches at a compression of 4.60 cm, and it takes a force of 9.12 n to compress the spring to that point. (note: while the spring is being compressed the ball is not in contact with the spring.) (a) if the gun is fired vertically, how fast is the pellet moving when it loses contact with the spring? (include the effect of gravity and assume that the pellet leaves the spring when the spring is back to its relaxed length.)

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Physics, 24.10.2019 20:43, Marmama23

Consider a spring that does not obey hooke's law very faithfully. one end of the spring is fixed. to keep the spring stretched or compressed an amount x, a force along the x-axis with x-component fx=kx−bx2+cx3 must be applied to the free end. here k=100n/m, b=700n/m2, and c=12,000n/m3. note that x> 0 when the spring is stretched and x< 0 when it is compressed. (a) how much work must be done to stretch this spring by 0.050 m from its unstretched length? (b) how much work must be done to compress this spring by 0.050 m from its unstretched length? (c) how much work must be done to move the spring from being compressed by 0.070 m to being stretched by 0.030 m, assuming the end moves with constant speed during the motion?

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