Solution :
Given weight of Kathy = 82 kg
Her speed before striking the water, 
= 5.50 m/s
Her speed after entering the water, 
= 1.1 m/s
Time = 1.65 s
Using equation of impulse,
Here, F = the force ,
dT = time interval over which the force is applied for
= 1.65 s
dP = change in momentum
dP = m x dV
![$= m \times [V_f - V_o] $](https://tex.z-dn.net/?f=%24%3D%20m%20%5Ctimes%20%5BV_f%20-%20V_o%5D%20%24)
= 82 x (1.1 - 5.5)
= -360 kg
∴ the net force acting will be
= 218 N
Answer:
d) What is the force if we doubled both the masses AND we doubled the distance
I’m going to use molasses as an example of a substance.
The mass and volume both change when changing the amount of molasses.
However, the density does not change. This is because the mass and volume increase at the same rate/proportion!
Even though there is more molasses (mass) in test tube A, the molasses also takes up more space (volume). Therefore, the spacing between those tiny particles that make up the molasses is constant (does not change).
The size or amount of a material/substance does not affect its density.
Anything less dense than water will float, like oil. Anything more dense than water will sink, like rock.
The wind will blow from higher pressure over the water to lower pressure over the land causing sea breeze. <span>The </span>sea breeze<span> strength will vary depending on the temperature difference </span>between<span> the </span>land<span> and the ocean</span>
