Answer:
Hello,
Step-by-step explanation:
<u />
<u>Formula used (a+b)^2=a²+2ab+b²</u>
<span>the particle's initial position is at t=0, x = 0 - 0 + 4 = 4m
velocity is rate of change of displacement = dx/dt = d(t^3 - 9t^2 +4)/dt
= 3t^2 - 18t
acceleration is rate of change of velocity = d(3t^2 -18t)/dt
= 6t - 18
</span><span>the particle is stationary when velocity = 0, so 3t^2 - 18t =0
</span>3t*(t - 6) = 0
t = 0 or t = 6s
acceleration = 6t - 18 = 0
t = 3s
at t = 3s, velocity = 3(3^2) -18*3 = -27m/s
displacement = 3^3 - 9*3^2 +4 = -50m
Answer:
V= 42.41
Step-by-step explanation:
where r is the radius = 3 and h is the height = 4.5
× 
× 
V = 42.41
Answer:
10 degrees
Step-by-step explanation:
7 - (-3) = 7+3 = 10 degrees
