danago said:Alright, now how can you determine how long before it hits the ground?
dsptl said:y = vi * t + .5at*t
20 = 3.4t - 5t*t
Is the positive y direction in your coordinate system pointing downward?dsptl said:i think
Vy = 10sin20degree
Vx = 10cos20degree
dsptl said:so is it like
-20 = -3.4t - 5t*t
Projectile motion is the motion of an object through the air, under the influence of gravity, after being launched at an angle.
The angle in projectile motion is the angle at which the object is launched from the ground, measured from the horizontal.
To solve for projectile motion, you need to know the initial velocity, angle of launch, and height of the object. Using these values, you can use equations of motion to calculate the horizontal and vertical components of the object's position, velocity, and acceleration at any given time.
The formula for projectile motion is:
x = x0 + v0 * cos(theta) * t
y = y0 + v0 * sin(theta) * t - 0.5 * g * t2
where x and y are the horizontal and vertical components of the object's position, x0 and y0 are the initial position, v0 is the initial velocity, theta is the angle of launch, t is time, and g is the acceleration due to gravity (9.8 m/s2).
The factors that affect projectile motion are the initial velocity of the object, the angle at which it is launched, the height of the object, and the force of gravity. Air resistance can also affect the motion, but it is often neglected in simplified calculations.