Answer:
the work done by the net external force acting on the skier is 3046.12 J.
Explanation:
Given;
initial speed of the water skier, u = 6.3 m/s
final speed of the water skier, v = 10.9 m/s
mass of the water skier, m = 77 kg
The work done by the net external force is calculated as;
W = ΔK.E
Therefore, the work done by the net external force acting on the skier is 3046.12 J.
Answer:
The tension on each rope is 28.28 lb
Explanation:
Given that,
Weight = 40 lb
Angle = 45°
We need to calculate the tension on each rope
Considering the symmetry of the system, the tension of each rope must be same
So,
Put the value into the formula
Hence, The tension on each rope is 28.28 lb.
I think the correct answer would be the first option. Scientific models are used to allow scientists to extrapolate or interpolate data. Or in other words, allow them to predict values without performing more experiments. However, they are obtained by experiments first.
The answer is A) frequency
The amplitude of Wave 2 is greater than Wave 1's, as is the wavelength. You can see that Wave 2 has a higher period and greater peaks and troughs than Wave 1.
You can also see that Wave 2 has half the frequency, meaning Wave 1 completes 2 periods for every 1 period that Wave 2 completes.
The answer is 3, 240J
KE=1/2 m v^2
KE= 1/2(45kg)(12m/s)^2
KE=1/2*45*144
KE= 3, 240 Joules