unit 3 - 2d motion
11/16/18
projectile motion : projectile motion is a form of motion experienced by an object or particle that is thrown near the earth's surface and moves along a curved path under the action of gravity only.
11/16/18
projectile motion : projectile motion is a form of motion experienced by an object or particle that is thrown near the earth's surface and moves along a curved path under the action of gravity only.
x direction
y direction
uniform circular motion
angular velocity - how many times an object makes a revolution per unit of time.
v = w x r
*w = objects speed *r = radius in meters
speed and velocity are usually interchangeable because it is uniform
period = unit of time (length of one revolution)
centripetal acceleration
an object moving in a circular path always accelerates toward the center of the circle
a = v^2 / r
a = acceleration that points to center
v = instanous velocity
r = radius of circle
we use this formula bc speed isn't changing only direction
- ax= 0
- vx= v0x= v0cos
- x = x0 + v0xt = x0 + (v0cos)t
y direction
- Ay= -g
- vy= v0y + Ayt = v0sin + (-g)t
- Y = y0 + v0y t + 12Ayt2= y0 + (v0sin)t - 12gt2
- ^Y = final height
uniform circular motion
angular velocity - how many times an object makes a revolution per unit of time.
v = w x r
*w = objects speed *r = radius in meters
speed and velocity are usually interchangeable because it is uniform
period = unit of time (length of one revolution)
centripetal acceleration
an object moving in a circular path always accelerates toward the center of the circle
a = v^2 / r
a = acceleration that points to center
v = instanous velocity
r = radius of circle
we use this formula bc speed isn't changing only direction
Universal Law of Gravitation
- G = Universal gravitational constant = 6.67 * 10-11 (N * m2)/(kg2)
- m1 = mass of first object (kg)
- m2 = mass of the second object (kg)
- r = Distance between the centers of the two objects (meters)
- The force of gravity between two objects is dependent on the masses of the objects and the distance between them