How do you calculate the time it takes an object to fall?
The acceleration of gravity near the earth is g = -9.81 m/s^2. To find out something’s speed (or velocity) after a certain amount of time, you just multiply the acceleration of gravity by the amount of time since it was let go of. So you get: velocity = -9.81 m/s^2 * time, or V = gt.
How do you calculate the drag force of a falling object?
- An object that is falling through the atmosphere is subjected to two external forces. The first force is the gravitational force, expressed as the weight of the object, and the second force is the aerodynamic drag of the object.
- W = m * g.
- D = Cd * .5 * r * V^2 * A.
- F = m * a.
- a = F / m.
- F = W – D.
- a = (W – D) / m.
How far can an object move in a problem?
Distance = how far an object has moved. It can be measured in feet, inches, meters, miles, centimeters, etc. 4. Displacement = the distance of a body’s change in position from a starting point.
Why is it easier to move an object already in motion?
Static friction(the friction which keeps the object at rest) is slightly more than sliding friction.So,it is easier to keep an object moving which is already in motion than to move it from rest.
Is it harder to get an object moving from rest or keep it moving?
For an object at rest on a flat table, static friction is zero. If you push horizontally with a small force, static friction establishes an equal and opposite force that keeps the book at rest. It is harder to move a stationary object than it is to keep a moving object in motion.
What is easier to move the box from rest or to move it when it is already in motion?
It is easier to move a box which is already in motion then to move it from rest because when th box is in motion its net speed working on it is more ,so it is easier to move a box which is already in motion .
Why is it easier to move the box in the second case?
it is easier to move the box in the second case cuz the smooth surface the friction is less so its difficult to pull the box.