If an object travels 245 km in 5 hours, what was the speed of the object?
1 answer:
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Answer:
500000N/m²
5250N
Explanation:
Given parameters:
Depth(H) = 50m
Density of water = 1000kg/m³
Acceleration of free fall = 10m/s
Unknown:
Pressure the water exerts on the diver = ?
Solution:
Pressure is the force per unit area on a body. In fluids, pressure is the product of density, gravity and height
Pressure in fluids = Density x acceleration due to gravity x height
Input the variables and solve;
Pressure in fluids = 1000 x 10 x 50 = 500000N/m²
B.
width of window = 150mm
height of window = 70mm
Force water exerts on the window = ?
To solve this problem;
Pressure =
Area of the window = width x height = 150 x 10⁻³ x 70 x 10⁻³
= 1.05 x 10 ⁻²m²
Force = pressure x area
Input the variables;
= 500000N/m² x 1.05 x 10 ⁻²m²
= 5250N
Answer:
A. A = 0.913 m
B. amax = 132.24m/s^2
C. Fmax = 324.01N
Explanation:
When the block is moving at the equilibrium point , its velocity is maximum.
A. To find the amplitude of the motion you use the following formula for the maximum velocity:
(1)
vmax = maximum velocity = 11.0 m/s
A: amplitude of the motion = ?
w: angular frequency = ?
Then, you have to calculate the angular frequency of the motion, by using the following formula:
(2)
k: spring constant = 355 N/m
m: mass of the object = 2.54 kg
Next, you solve the equation (1) for A and replace the values of vmax and w:
The amplitude of the motion is 0.913m
B. The maximum acceleration of the block is given by:
The maximum acceleration is 132.24 m/s^2
C. The maximum force is calculated by using the second Newton law and the maximum acceleration:
It is also possible to calculate the maximum force by using:
Fmax = k*A = (355N/m)(0.913m) = 324.01N
The maximum force exertedbu the spring on the object is 324.01 N