1
answer
0
watching
660
views
13 Nov 2019
A mass that weighs 8 lb stretches a spring 24 in. The system is acted on by an external force of 4 sin (4t). Ir the mass is pulled down 6 in and then released, determine the position of the mass at any time t, Assume that the u-axis is directed downwards and g = 32 . Express your answer in as a linear combination of sin at and cos (at). ft Enclose arguments of functions in parentheses. For example, sin (2*x). Use an asterisk, *, to indicate multiplication. For example, 2 * f (x), a*x*(x +b) *(c*x +d), b*tan (a * θ) or ea*x) *b. u (t) = || 1/4"cos(4"t)+1/2.sin(41% , 3 , where u is in feet and t is in seconds. Determine the first four times at which the velocity of the mass is zero. Excludet0 as trivial. Enter the exact answerS. First zero: t =11 18 Second zero: t = 1/4..Ï. Third zero: =11 1/2-Ï. Fourth zero:(3* TT) (1/4)
A mass that weighs 8 lb stretches a spring 24 in. The system is acted on by an external force of 4 sin (4t). Ir the mass is pulled down 6 in and then released, determine the position of the mass at any time t, Assume that the u-axis is directed downwards and g = 32 . Express your answer in as a linear combination of sin at and cos (at). ft Enclose arguments of functions in parentheses. For example, sin (2*x). Use an asterisk, *, to indicate multiplication. For example, 2 * f (x), a*x*(x +b) *(c*x +d), b*tan (a * θ) or ea*x) *b. u (t) = || 1/4"cos(4"t)+1/2.sin(41% , 3 , where u is in feet and t is in seconds. Determine the first four times at which the velocity of the mass is zero. Excludet0 as trivial. Enter the exact answerS. First zero: t =11 18 Second zero: t = 1/4..Ï. Third zero: =11 1/2-Ï. Fourth zero:(3* TT) (1/4)
Lelia LubowitzLv2
20 Jan 2019