Tuesday
September 30, 2014

Posts by Henry


Total # Posts: 9,177

algebra
10. 16-9+25 = 32 11. 32/(-7+5)^3 = 32/-8 = -4. 12. 4^3-(2-5)^3 = 64 - (-27) = 91
August 10, 2013

math
Gregg: p + q Coins. Brother: 8p + 4q Coins. Sum = 8p+p + q+4q = 9p + 5q
August 10, 2013

math
1. 0x+6y-5x = 5x+6y. 2. 9x^2+10+4x^2+7 = 13x^2+17.
August 10, 2013

algebra
P1(1,-3),P2(2,4). D^2 = (2-1)^2 + (4+3)^2 = 50 D = 7.07
August 10, 2013

Maths
tan 60o = (Y1+Y2)/X1 = 3000/X1 X1*tan 60 = 3000 X1 = 3000/tan60 = 1732 m. tan 30o = (Y1+Y2)/(X1+X2)=3000/(1732+X2) (1732+X2)*tan30 = 3000 1732+X2 = 3000/tan30 = 5196 X2 = 5196-1732 = 3464 m tan30 = Y2/X2 = Y2/3464 Y2 = 3464*tan30 = 2,000 m. Y1 = 3000-2000 = 1,000 m. = Distance...
August 9, 2013

introduction to finance-16
1. P = Po*(1+r)^n Po = $4,000. r = (4%/100%) = 0.04 n = 1Comp./yr * 5yrs = 5 Compounding periods. Plug the above values into the given Eq and get: P = $4,866.61. 2. P = Po(1+(y-1))*(1+r)^n Y = Length of loan = 5 years. P = 4000(1+4)*(1.04)^5 = $24,333.06
August 9, 2013

math
Eq1: x*y = -84 Eq2: x+y = 5 x+y = 5 y = 5-x In Eq1, replace y with 5-x: x*(5-x) = -84 5x-x^2 = -84 -x^2+5x+84 = 0 Use Quadratic Formula and get: X = -7, and 12.
August 8, 2013

Math
The angles are assumed to be complimentary(sum=90o). DCE + ECF = 90o 4x+15 + 6x-5 = 90 10x + 10 = 90 10x = 80 X = 8 DCE = 4*8 + 15 = 47o
August 8, 2013

Mechanics, Waves and Optics
Wt. of crate=m*g=18kg * 9.8N/kg=176.4 N. Fv = 176.4*cos0 = 176.4 N. = Force perpendicular to the surface. Fk = u*Fv = 0.5 * 176.4 = 88.2 N. = Force of kinetic friction. Fap*cos20-Fk = m*a Fap*0.94-88.2 = 18*0 = 0 0.94Fap = 88.2 Fap = 93.9 N. = Force applied b. Tension = Fap = ...
August 7, 2013

physical science
V = Vo + a*t = 10 m/s. 6 + a*2 = 10 2a = 4 a = 2 m/s^2.
August 7, 2013

geometry
a. RS + ST = RT 8y+4 + 4y+8 = 15y-9. Solve for y. b. Replace y with the value calculated in prob. a.
August 7, 2013

Algebra
P = Po(1+r)^n P = $5000 Po = $3500 r = (4.5%/12)/100% = 0.00375 = Monthly % rate expressed as a decimal. n = 12Comp/yr * T yrs = 12T = The # of compounding periods. P = 3500*(1.00375)^12T = 5000 (1.00375)^12T = 5000/3500 = 1.42857 Take Log of both sides: 12T*Log (1.00375) = ...
August 7, 2013

Mathematic
1. 2/(2/3) + 3/4/(4/5). 2/(2/3) + (3/4)/(4/5) = 2*(3/2) + (3/4)*(5/4) = 6/2 + 15/16 = 48/16 + 15/16 = 63/16 2. (2/5)(2/3)/(5/6)/(3/10) = (2/5)(2/3)(6/5)(10/3) = 240/225 = 48/45 = 16/15. The answer cannot be less than one.
August 7, 2013

All subjects
You are welcome! We are glad we can help.
August 6, 2013

MatHS
The angle of inclination is always between 0o and 180o and is measured CCW from the positive x-axis. A. x+y+1 = 0 x+y = -1 Tan A = m = -A/B = -1/1 = -1 Ar = -45o = Reference angle. A = -45 + 180 = 135o. B. 3-2y = 9x 9x+2y = 3 Tan A = m = -A/B = -9/2 = -4.5 Ar = -77.47o A = -77...
August 6, 2013

maths
See previous post: Tue,8-6-13,12:09 PM
August 6, 2013

maths
See previous post: 12:09 PM.
August 6, 2013

maths
Y = 2x Tan A = m1 = 2 A = 63.43o (-1,7/3),(0,2). m2 = Tan B = (2-7/3)/(0+1) = (-1/3)/1 = -1/3. B = -18.43o = -18.43o C = A-B = 63.43 - (-18.43) = 81.9o = Angle between A and B.
August 6, 2013

Math
What is the question?
August 5, 2013

maths
CORRECTION: m1 = m2 = -A/B = 6/2 = 3 Y = mx + b = -1 3*3 + b = -1 b = -10 Eq: Y = 3x - 10
August 5, 2013

maths
(3,-1). -6x + 2y = 1 Parallel lines have equal slopes: m1 = m2 = -A/B = 6/-2 = -3 Y = mx + b = -1 -3*3 + b = -1 b = 8 Eq: Y = -3x + 8
August 5, 2013

mathematics
P(-6,-2). 3x + 2y = 6 m1 = -A/B = -3/2 m2 = -(-2/3) = 2/3 = Negative reciprocal Y = mx + b = -2 2x/3 + b = -2 (2*-6)/3 + b = -2 -4 + b = -2 b = 2. Eq: Y = 2x/3 + 2
August 5, 2013

physics
See previous post.
August 5, 2013

physics
Assuming no wind: Vo*t + 0.5g*t^2 = 1.4 m. 0 + 0.5*1.63*t^2 = 1.4 0.815t^2 = 1.4 t^2 = 1.72 t = 1.31 s.
August 5, 2013

algebra
Yes, post your problem.
August 5, 2013

Physics
h1 = Vo*t + 0.5g*t^2 h1 = -9*18 + 4.9*18^2 = 1426 m Above ground when bag was released. h2 = 9*18 = 162 m.. Above point of release. h = 1426 + 162 = 1588 m. Above ground.
August 4, 2013

physics
A = 3.45 m/s[90o] B = 2.39 m/s[270o] C = V m/s 3.45[90o]+2.39[270]+V = 0 @ the peak of its' trajectory. 3.45*cos90+2.39*cos270+i3.45*sin90+i2.39*sin270 + V = 0 0+0 + 3.45i-2.39i + V = 0 0 + 1.06i + V = 0 V=-1.06i = 1.06 m/s[270o]=1.06m/s[-90o].
August 4, 2013

math
3X5Y/2Y8 = 15x/16. 15x/16 = 1 = The smallest whole number. 15x = 16 X = 16/15 = 1 1/15. According to my analysis, x cannot equal 0,2,4, nor 6.
August 3, 2013

science
The current through all elements of a circuit is the same IF there are no elements in parallel.
August 3, 2013

Physics
tan A = 50m/79m = 0.63291 A = 32.3o East of North = 57.7o CCW. b. Vs = 1.9m/sin57.7 = 2.25 m.[57.7o] = Velocity of swimmer. Vc = 2.25m/s[57.7o] - 1.9[90o] X = 2.25*cos57.7 - 1.9*cos90=1.20 m/s. Y=2.25*sin57.7 - 1.9*sin90 = 0 m/s. b. Vc = 1.20 + i0 = 1.20 m/s =Velocity of the ...
August 1, 2013

physics
See 6:26 PM post.
July 31, 2013

physics
See 5:58 PM post.
July 31, 2013

physics
20*Log(V1/Vo) = 38 db Log(V1/Vo) = 1.9 V1/Vo = 79.4
July 31, 2013

physics
130db/19 = 6.84 db.
July 31, 2013

physics
a. 10*Log(I1/Io) = 17db Log(I1/Io) = 1.7 I1/Io = 50.1 b. 10*Log(I1/Io) = -32 db Log(I1/Io) = -3.2 I1/Io = 0.00063
July 31, 2013

physics
Vs = 332 m/s @ 0oC. = Velocity of sound. Vs = 332m/s + (22-0)oC*0.6m/s/oC Vs = 332 + 13,2 = 345.2 m/s. @ 22oC. a. d = Vs*t = 345 * 0.8 = 276 m b. d1 = d V*T = Vs*(T+0.8) 3*10^8T = 345(T+0.8) 3*10^8T = 345T+276 3*10^8T = 276 T = 92*10^10^-8 s. d = V*T = 3*10^8 * 92*10^-8 = 276 m.
July 31, 2013

math
2L + 2W = 42 2*11 + 2W = 42 2W = 20 W = 10 L = 11
July 31, 2013

Physics
K = k1 + k2 = 35 + 55 = 90N/cm.
July 31, 2013

Math (Triangles)
A = B = (180-40.33)/2 = 69.83o = Base angles. sinA/a = sinC/c sin69.83/320 = sin40.33/c c*sin69.83 = 320*sin40.33 c = 320*sin40.33/sin69.83 = 220.6 mm Or cosA = 0.5*AB/AC AC*cosA = 0.5*AB AB = 2AC*cosA = 2*320*cos669.83=220.7 mm
July 31, 2013

Discrete Mathematics
Year 1--2013--3^0*500 = 500 Rabbits Year 2--2014--3^1*500 = 1500 Year 3--2015--3^2*500 = 4500 Year n--20xx--3^(n-1)*500 = 100,000 3^(n-1)*500 = 100000 3^(n-1) = 200 (n-1)*Log 3 = Log 200 n-1 = Log 200/Log 3 = 4.82 n = 5.82 or 6 Yrs.
July 30, 2013

Discrete Mathematics
Fx) = 2x + 3*1/x F(x) = 2x + 3/x
July 30, 2013

hs math
P = 249.73/mo * 72mo = $17,980.56 P = (Po*r*t)/(1-(1+r)^-t) = 17,980.56 r = (3.599%/12)/100% = 0.0029992 = Monthly % rate expressed as a decimal. (Po*0.0029992*72)/(1-(1.0029992)^-72)= 17,980.56 Po*0.21594/(1-(1-(1.0029992)^-72)=17980.56. 0.21594Po/0.19396 = 17980.56 1.11332Po...
July 29, 2013

physics
Eq1: 4*t = d Eq2: 5*t = 6 + d In Eq2, replace d with 4t: 5t = 6 + 4t 5t-4t = 6 t = 6 s. In Eq1, replace t with 6: d = 4 * 6 = 24 m.
July 29, 2013

physics
L1 = 0.810 m. Temp. Change = +18o C. T.C. = 1.9*10^-5/C a. T^2 = 4pi^2(L/g) T^2 = 39.4(0.81/9.8) = 3.25653 T = 1.8046 s. b. L2 = L1 + L1*(T.C.)*18 L2=0.81 + 0.81(1.9*10^-5)*18=0.81027702 m. T^2 = 39.4(0.81027702/9.8)=3.25764 T = 1.8049 s. Change in period = 1.8049-1.8046 = 0....
July 28, 2013

physics
m1*g = 0.30kg * 9.8N/kg = 2.94 N. L1 = 0.26 m. m2*g = 1.90kg * 9.8N/kg = 18.62 N. L2 = 0.75 m. a. K = (N2-N1)/(L2-L1) K = (18.62-2.94)/(0.75-0.26) = 32 N/M b. (2.94N/32N) * 1M = 0.092 M. L + 0.092 = 0.26 L = 0.26 - 0.092 = 0.168 M.
July 28, 2013

General Physics
Wt. of block=m*g = 4kg * 9.8N/kg=39.2 N. Et = Ek + Ep = 0.5m*V^2 Ek + Ep = 0.5*4*(5.1)^2 = 52 J. 0 + Ep = 52 @ hmax. Ep = 52 @ hmax Ep = mg*h = 52 39.2h = 52 h = 1.33 m. Dist. up ramp = h/sinA = 1.33/sin13= 5.91 m.
July 26, 2013

General Physics
F1 = (0.2m/1m) * 28N = 5.6 N. To stretch spring 0.2 m. Work = F1 * d = 5.6 * 0.2 - 1.12 J. F2 = (0.2m+0.06m)/1m) * 28 N.=7.28 N. Work = F2 * d = 7.28 * 0.26 = 1.89 J. 1.89-1.12 = 0.77 J. to stretch it an additional 0.06 m.
July 26, 2013

General Physics
m*g = 7453 N. m*g = 7453 N. Fp = 7453*sin25.9 = 3256 N. = Force parallel to incline. Fap = Fp = 3256 N. = Force applied. Work = F * d = 3256 * 4.04 = 13,152 J. fp =
July 26, 2013

geometry
<1 = <2 = 4x-9 = 63o. 4x-9 = 63 4x = 63+9 = 72 X = 18o. The value of 9 is 9.
July 26, 2013

physics
Vo = 60km/hr = 60000m/3600s = 16.67 m/s. V^2 = Vo^2 + 2a*d a = (V^2-Vo^2)/2d a = (0-(16.67)^2)/60 = -4.63 m/s^2. Wt. of car = m*g = 15000 N. mass = 15000/9.8 = 1531 kg F = m*a = 1531 * -4.63 = -7.1 N.
July 25, 2013

physics
a=(V-Vo)/t = (-48.4--43.8)/1.08=-85.37 m/s^2. F = m*a = 0.148 * -85.37 = -12.6 N.
July 25, 2013

Math
3^2 + 3 = 12. Units digit = 2.
July 25, 2013

calculus
V^2 = Vo^2 + 2g*h h = (V^2-Vo^2)/2g h = ((190)^2-(30)^2)/64 = 550 Fi.
July 24, 2013

compound intrest
T = 365 + 57 = 422 Days. r = (3.5%/365)/100% = 9.58904*10^-5 = Daily % rate expressed as a decimal. I = Po*r*T I= 32000*0.00009589*422 = $1294.90
July 23, 2013

Physics
Vc = 81000m/3600s = 22.5 m/s. = Velocity of car. F = ((V+Vr)/(V+Vc)))*Fh = 958Hz. ((345+22.5)/(343-22.5))*Fh = 958 367.5Fh/322.5 = 958 1.140Fh = 958 Fh = 841 Hz. = Freq. of horn.
July 22, 2013

Physics
A. h = Vo*t + 0.5g*t^2 = 0.481 m. 0 + 4.9t^2 = 0.481 t^2 = 0.09816 t = 0.313 s. Each ball. B. V = Vo + g*t V = 0 + 9.8*0.313 = 3.07 m/s. Each ball.
July 22, 2013

algebra
2^3*sqrt(18)/6 = 8*sqrt(9*2)/6 = 8*3*sqrt(2)/6 = 24*sqrt(2)/6 = 4*sqrt(2). sqrt means square root.
July 22, 2013

science
See previous post.
July 22, 2013

science
A = 5m[240o] B = 2.5+6i C = -2.5i X = 5*cos240 + 2.5 = 0 Y = 5*sin240 + 6 - 2.5 = -0.83 D = 0-0.83i = 0.83m[-90o].
July 22, 2013

general physics
V^2 = Vo^2 + 2g.h Vo^2 = V^2-2g.h Vo^2 = 0-(-19.8)*190sin13 = 837.7 Vo = 28.9 m/s.
July 22, 2013

dynamics
See 10:35am post.
July 22, 2013

Dynamics
Ek = 0.5m*V^2 *h - = 750 * 6^2 = 27,000 J. Wt. = Fg = 1500kg * 9.8N/kg = 14,700 N. Ep = Fg * h = 27000-Fk*d 14700*5*sin20 = 27000-Fk*5 25138.5 = 27000-5Fk 5Fk = 27000-25138.5 = 1861.5 Fk = 372 N.
July 22, 2013

dynamics
V^2 = Vo^2 + 2g*h h = (V^2-Vo^2)/2g h = (0-625)/-19.6 = 31.89 m. NOTE: V = 0 @ max. Ht.
July 22, 2013

general physics
Di + Db = Dsw 917 + Db = 1025 kg/m^3 Db = 108 kg/m^3 = Density of the bear. Mass of bear = 6.76m^3*108kg/m^3=730 kg Wt. of bear = 730kg * 9.8N/kg = 7154 N.
July 20, 2013

science
CORRECTION: Ek = 84.672 J.
July 20, 2013

science
V^2 = Vo^2 + 2g*d Vo^2 = V^2-2g*d Vo^2 = 0-(-19.6*1.2 = 23.52 Vo = 4.85 m/s. Ek = 0.5m*Vo^2 = 3.6*(4.85)^2 = 11.76 J. vo^2
July 20, 2013

MATH
h = 125-5t^2 = 0 -5t^2 + 125 = 0 t^2 - 25 = 0 (t+5)(t-5) = 0 t = -5 t = 5 s. V = g*t = 9.8 * 5 = 49 m/s.
July 19, 2013

physics
Vs = 25 m/s = Velocity of the source. F = 260 Hz(NOT 26Hz). Fo = 240 Hz. Vr = Velocity of the receiver(person) F = (V+Vr)/(V-Vs)*Fo = 260 Hz. (V+0)/(V-25)*240 = 260 240V/(V-25) = 260 240V = 260V - 6500 -20V = -6500 V = 325 m/s.
July 17, 2013

Math
P = (Po*r*t)/(1-(1+r)^-t) Po = $81,000. r = (9%/12)/100% = 0.0075 = Monthly % rate expressed as a decimal. t = 25yrs. * 12mo/yr. = 300 Months. Plug the above values into the given Eq and get: P = $203,924.72 Monthly Payments = P/t Monthly Int. = (P-Po)/t. Monthly Prin. = (P/t...
July 17, 2013

physics/science
See previous post.
July 17, 2013

physhcs
Xc = 1/W*C = 1/314.2*3*10^-6 = 1061 Ohms Z = R-jXc = 500 -j1061 = 1173[-64.8o]. 1. I = V/Z=12/1173[-64.8o]=0.01023[64.8] 2. Vc= I * Xc = 0.01023[64.8]*1061[-90o]= 10.85 Amps.[-25.2o] 3. A = -25.2o 4. P = I^2*R = (0.01023)^2 * 500= 0.0523 W. 5. Pf = cosA = cos(-64.8) = 0.426
July 17, 2013

phys ics
b. V = (0.243/0.335) * 28m/s = 20.3 m/s.
July 16, 2013

physics
Circumference=pi*2r=3.14*0.67=2.1=2.1 m. Va = 24.1m/s * 6.28rad/2.1m=72.1 rad/s.
July 16, 2013

physics
d = 0.5g*t^2 = 5.95 m. 4.9t^2 = 5.95 t^2 = 1.21 s. t = 1.10 s. 2.55rev/s * 1.1s = 2.8 revs.
July 16, 2013

physics
a. 28.9rad/s * 1rev/6.28rad = 4.60 rev/s. t = (13.6/4.60) * 1s = 3.0 s. b. V = Vo + at = 0 When @ rest. 28.9 + a*3 = 0 3a = -28.9 a = -9.63 rad/s^2.
July 16, 2013

physics
a. d = 2870rev * 6.28rad/rev = 18,024 rad. t = 18,024rad/131rad/s = 138 s. V = Vo + a*t = 131 rad/s Vo + 0.170*138 = 131 Vo = 131-23.4 = 108 rad/s. b. t = 138 s.
July 16, 2013

physics
V = Vo + at = 4.4 rad/s. 0 + 4.2t = 4.4 t = 4.4/4.2 = 1.05 s.
July 16, 2013

physics
d1 + d2 = 2pi rads = A complete circle. V1t + V2t = 2pi 2.46*10^-3 + 7.91*10^-3 = 6.28 10.37*10^-3t = 6.28 t = 606 s.
July 16, 2013

Math
See previous post.
July 16, 2013

Math
See previous post.
July 16, 2013

Math
Eq1: x^2 + y^2 = 34 Eq2: x + y = 2 x + y = 2 Y = 2 - x In Eq1, replace Y with 2 - x. x^2 + (2-x)^2 = 34 x^2 + 4 - 4x + x^2 = 34 2x^2 -4x + 4 = 34 2x^2 -4x - 30 = 0 Divide both sides by 2: x^2 - 2 - 15 = 0 (x+3)(x-5) = 0 x+3 = 0 X = -3. Y = 2- x = 2-(-3) = 5 x-5 = 0 X = 5. Y = ...
July 16, 2013

physics
Wt. = (6.0/1.0)^2 * 45.8 = 1649 N.
July 16, 2013

Elementary mechanics
My answer is the Rise Time or time to reach max. height. R = Vo*cosA * (Tr+Tf) Tr = Tf. Therefore, R = Vo*cosA * 2Tr. Tr = Rise time. Tf = Fall time. Vo*cosA = Hor. component of initial velocity.
July 15, 2013

Physics
Circumference=pi*D = 3.14 * 41=128.8 cm= 1.288 m. Vo = (86rev/min)*1min/60s*1.288m/rev = 1.85 m/s. V = (342/86) * 1.85 = 7.34 m/s a=(V-Vo)/t = (7.34-1.85)/3.4=1.61 m/s^2 d =Vo*t + 0.5*a*t^2 d=1.85*3.4 + 0.5*1.61*(3.4)^2= 15.6 m.
July 14, 2013

physics
Wt. = Fg = m*g = 60kg * 9.8N/kg=588 N.= Wt. of skier. Fp=588*sin35 = 337 N.=Force parallel to incline. Fv = 588*cos35 = 482 N. = Force perpendicular to incline. Fk = u*Fv = 0.08 * 482 = 38.5 N. = Force of kinetic friction. d =h/sinA = 2.5/sin35 = 4.36 m. Ek + Ep = Ekmax - Fk*d...
July 14, 2013

Physics
Wt. = m*g = 10kg * 9.8N/kg = 98 N. = Wt. of the luggage. F = 98N.[60o] = Force of luggage. Fp = 98*sin60 = 84.9 N. = Force parallel to incline. Fv=98*cos60 = 49 N.=Force perpendicular to incline = Normal. a. Work=mg * h = 98 * 6.5sin60= 552 J. b. Work = -98 * 6.5sin60 = -552 J...
July 14, 2013

physics
Density of water = 1000kg/m^3. V = 3m * 0.20m * 0.05m = 0.03 m^3=Vol. of board. 1 - (350/1000) = 0.65 = 13/20.
July 13, 2013

Physics
Impulse = m*V1-m*V2 Impulse = 2.4*2.5 - 2.4*1.5 = 2.4kgm/s
July 13, 2013

Elementary mechanics
F1 = 100[170o] F2 = 100[50o] X = 100*cos170+100*cos50o = -34.2 N. Y = 100*sin170+100*sin50 = 94 N. tan Ar = Y/X = 94/-34.2 = -2.74838 Ar = -70o = Reference angle. A = -70+180 = 110o Fr = X/cosA = -34.2/cos110 = 100N.[110o]
July 12, 2013

Trigonometry
Draw a picture of the situation: 1.Draw ver. line AC with A on the bottom. 2. Add point D on line AC. 3. Draw a hor. line from A to the left. Label it AB. Now we have a rt angle. 4. Draw hyp. BC. 5. Draw hyp. BD. <ABC = <ABD + <DBC = 61.5o 56.33 + <DBC = 61.5 <...
July 11, 2013

Physics
T^2 = 4*pi^2(L/g) 1a. Longer. A smaller g increases the ratio of L/g which increases the period. 1b. Unchanged. The mass is not included in the Eq. 1c. Shorter. The ratio of L/g decreases which decreases the period. 1d. Unchanged. The ratio of L/g remains the same. Therefore, ...
July 10, 2013

science
The 100W bulb.
July 10, 2013

Physics
Wc = m*g = 1650kg * 9.8N/kg = 16,170 N.= Wt. of car. k = 16,170N./3.5m. = 4620 N/m.
July 8, 2013

Physics
Wc = m*g = 1840kg * 9.8N/kg = 18032 N. = Wt. of car. Fc = 18,032N[12.5o] = Force of the car. Fp = 18,032*sin12.5 = 3903 N. = Force parallel to incline. F-Fp = m*a = m*0 = 0 F-3903 = 0 F = 3903 N. Parallel to the incline Work = F*d = 3903 * 14 = 54,642 J.
July 8, 2013

physics
g = 9.8/6 = 1.633333 m/s^2 on moon. d = o.5g*t^2 = 50 m. 0.5*1.63333*t^2 = 50 0.81666t^2 = 50 t^2 = 61.22 t = 7.82 s.
July 8, 2013

physics
b. Fn = m*a a = Fn/m = (940-521)/95.9 = 4.37m/s^2. V = Vo + a*t = 0 Vo = -a*t = -(-4.37*1.63) = 7.1 m/s.
July 8, 2013

physics
Wp = m*g = 95.9kg * 9.8N/kg = 940 N. = Wt. of player. a. Fk = 0.554 * 940 = 520.7 N.
July 8, 2013

physics
CORRECTION: b. hmax = 3 + 0.141 = 3.141 m.
July 8, 2013

physics
a. V^2 = Vo^2 + 2g*h h(up) = (V^2-Vo^2)/2g. h(up) = (0-2.76)/-19.6 = 0.141 m. V^2 = Vo^2 + 2g*h V^2 = 0 + 19.6(0.141+3) = 61.6 V = 7.85 m/s. b. 0.141 m.
July 8, 2013

math
See previous post: 7:09pm.
July 8, 2013

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