How long does the ball remain in the air?
It stops, for zero amount of time, right at the peak of its travel. It does not remain at that peak for any length of time. The part that confuses people, is that from the moment the ball is released from your hand, it is accelerating downward due to gravity.
How much time in seconds does the ball spend in the air before it reaches the ground?
t = v/a = 30/9.8 = 3.06 seconds.
How do you calculate hours and minutes?
There are 60 minutes in 1 hour. To convert from minutes to hours, divide the number of minutes by 60. For example, 120 minutes equals 2 hours because 120/60=2.
How do you calculate how far a ball is thrown?
Horizontal distance traveled can be expressed as x = Vx * t , where t is the time. Vertical distance from the ground is described by the formula y = h + Vy * t – g * t² / 2 , where g is the gravity acceleration.
How do you calculate how long a projectile is in the air?
To define the time of flight equation, we should split the formulas into two cases:
- Launching projectile from the ground (initial height = 0)
- t = 2 * V₀ * sin(α) / g.
- Launching projectile from some height (so initial height > 0)
- t = [V₀ * sin(α) + √((V₀ * sin(α))² + 2 * g * h)] / g.
How do you find the length of an area?
To find Length or Breadth when Area of a Rectangle is given
- When we need to find length of a rectangle we need to divide area by breadth.
- Length of a rectangle = Area ÷ breadth.
- ℓ = A ÷ b.
- Similarly, when we need to find breadth of a rectangle we need to divide area by length.
- Breadth of a rectangle = Area ÷ length.
How do I calculate my hours and work?
First, determine the total number of hours worked by multiplying the hours per week by the number of weeks in a year (52). Next, divide this number from the annual salary. For example, if an employee has a salary of $50,000 and works 40 hours per week, the hourly rate is $50,000/2,080 (40 x 52) = $24.04.
How do you calculate payroll minutes?
All you need to do is divide your minutes by 60. For example, say your employee worked 20 hours and 15 minutes during the week. Divide your total minutes by 60 to get your decimal. For this pay period, your employee worked 20.25 hours.
How do you calculate how far an object will travel?
Distance = time * velocity. d = v*t.
How do you calculate how long it will take something to hit the ground?
Divide the falling distance by 16. For example, if the object will fall 128 feet, divide 128 by 16 to get 8. Calculate the square root of the Step 2 result to find the time it takes the object to fall in seconds.
How do you calculate the time of flight?
To define the time of flight equation, we should split the formulas into two cases: 1. Launching projectile from the ground (initial height = 0) Let’s start from an equation of motion: y = V₀ * t * sin(α) – g * t² / 2. When the projectile hits the ground, the flight ends (y = 0). 0 = V₀ * t * sin(α) – g * t² / 2.
How do you calculate air changes per hour in HVAC?
All you need to know is the room area, height, and CFM. This is the formula for ACH (air changes per hour): ACH = CFM x 60 / (Area x Height) where ‘Area’ is the area of the space where you intend to have an HVAC device, and ‘Height’ is the height of the ceiling.
How to calculate the volume of an air purifier?
The volume of a room is calculated by length*width*height. Multiplying the length of the room with its width will give us the surface area (‘Area’). To get the volume, we have to multiply the area by height. The calculation of the recommended coverage area in the air purifier specification is based on CADR rating, maximum airflow, and ACH.
How many times does an air purifier change the air per hour?
Such an air purifier is capable of changes the whole volumetric air in room 15,000/1.600 = 9,375 times. Here is a neat air change per hour calculator you can freely use. Just put in the area, ceiling height, and CFM of an HVAC device in question, and you can calculate ACH: