32t + 148 = 0148 = 32t4.625 = tt ≈ 4.63h = -16 • (4.625)^2 + 148 • 4.625 + 30 = 372.25
ANSWER: is D. 4.63 sec; 372.25 ft
2.) 2x - 4 = 0 and 2x - 1 = 0x = {4/2, ½}x = {2,½} ANSWER: is B 2, 1 over 2
Answer:
Look at explanation
Explanation:
a) Kinetic Friction= μmg
μmg=0.53*88.9*9.8=461.75N
b) -461.75N=ma
a= -5.19m/s^2
v=v0+at
5.19*1.7=v0
v0=8.81m/s^2
Answer:
(c) 8240 kN
Resultant hydrostatic force F = 8240 kN
Explanation:
Force can be expressed as;
F = ma
F = mg ......1
Where,
F = force
m = mass
a = acceleration
g = acceleration due to gravity
And we know that mass of an object is the product of
Density and Volume
m = pV
And volume V = area × height = Ah
m = pAh .....2
Substituting m into equation 1
F = pAhg = pghA ......3
Given;
Density of water p = 1000kg/m^3
g = 9.81m/s^2
Area A = 20m × 12m = 240m^2
h = depth/2 = 7/2 = 3.5m
Substituting the values into equation 3, we have;
F = 1000×9.81×3.5×240
F = 8240400 N
Resultant hydrostatic force F = 8240 kN