Answer:
F = 260 kN
Explanation:
given,
speed = 45 m/s
Area = 225 m²
air density = 1.14 Kg/m³
Atmospheric pressure = 8.89 ✕ 10⁴ N/m²
Using Bernoulli equation
assuming the level is same
Force = Pressure x area
Force =1154.25 x 225
F = 259706.25 N
F = 260 kN
The length(extension in spring, x), force applied (F) and the spring constant(k) are related by the following equation:
F = kx
For spring 1:
60 = 4x
so,
x = 15 m
For spring 2:
50 = 5x
so,
x = 10m
Thus the extension in length of second spring will be 5 meters more than the first spring
35m/s is meters per second.
35x35=1225
it will have gone a total of 1225 meters on thirty five seconds
Answer:
The speed of the plank is 81.68 m/s
Explanation:
Given that,
Speed of bullet = 152 m/s
Speed of wood = 128 m/s
Speed of another bullet = 97 m/s
We need to calculate the speed of plank
Using conservation of momentum
Where,
u = initial velocity
v = final velocity
....(I)
....(II)
From equation(I) and equation(II)
Hence, The speed of the plank is 81.68 m/s