The ball's acceleration while it is contact with the floor is 98.4m/s²
<u>Explanation:</u>
V1 = -√(2gh1) = -4.85 m/s
V2 = √(2gh2) = 4.1056 m/s
dV = V2 - V1 = +8.9556 m/s
a = dV/dt = 8.9556/0.091 = 98.4 m/s²
Therefore, the ball's acceleration while it is contact with the floor is 98.4m/s²
Answer:
lift force = 0.213 N
Drag force =
Explanation:
Given: velocity v = 10 m/s
w = 100 rev/sec
diameter d = 3cm
density D = 1.2kg/m3
lift force =
Substituting the values into the equation, we obtain
lift force = 0.213 N
Drag force = C*D*A*v/2
where C = 0.5
substituting the values into the equation again, we have
Drag force =
Answer:
A
Explanation:
The order of the planets in the solar system, starting nearest the sun and working outward is the following: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Period = 2 seconds.
frequency = 1/2 cycle/second = 1/2 Hz
If it falls twice every four seconds, then it falls once every two seconds, therefore one falling period is two seconds.
Hz is equal to cycles per second. So if it goes through one cycle per two seconds, then it goes through 1/2 cycle per one second.
Hope this helps!
