... the mass is on each side and cancels out. The speed is the same for a puck or a railroad engine.
3 Answers · Science & Mathematics · 11/12/2018
f’ = observed frequency f = source frequency v = speed of sound vₛ = source’s speed= 72 km/h = 20m/s v₀ = observer’s speed = 32km...
3 Answers · Science & Mathematics · 17/09/2019
The speed is not needed for the total energy required if any gain in kinetic energy at the beginning is used in permitting the elevator to coast to a stop. E = mgh = ( 700+600)*10 * 9 = 117 kJ approximately.
2 Answers · Science & Mathematics · 15/08/2019
... v = 15.3 m/s t = 7.10 s and arrange the equation for the unknown u: 0.5*(u+v)*t = s (u + v)t = 2s (u + v) = (2s)/t u... in the question.) Therefore the antelope's initial speed was 4.14 m/s to 3sf.
1 Answers · Science & Mathematics · 28/01/2019
...motion and we can use the standard formula: max. speed = ω * amplitude We don’t need the wave speed (14m/s) as we told frequency and ω = 2πf. Hence: max. speed = 2πf * amplitude For wave A, max. particle speed = 2π(7) * 0.50 = 22.0m/s For wave B...
1 Answers · Science & Mathematics · 01/05/2019
Since the baseball player is moving at a constant speed, the friction force is equal to the centripetal force. To solve this problem, I will need to determine the exact number for the centripetal force. This is good way to check your answer. ...
3 Answers · Science & Mathematics · 02/02/2019
Now find the time time for first nut to fall to the ground. 12=1/2 g t^2. Time to fall...nut cover the distance. s=vo(t-t1) +1/2 g(t-t1)^2= 1/2 g t^2 Now solve for v0, the initial velocity of the second nut.
1 Answers · Science & Mathematics · 12/09/2019