Circular Motion
The name for any net force that causes an object to move in a circular path.
What is centripetal force?
The motion of an object that is launched by a force outside of itself.
What is projectile motion?
The acceleration of all objects in free fall near earth, regardless of their mass.
What is -10 m/s2? (Or -9.8 m/s2, to be precise)
The equation to calculate the velocity of an object moving in a circle.
What is the circumference (2ϖr) divided by the period? (This is the same as distance divided by time)
The law of physics that states that objects in motion tend to move in straight lines unless acted upon by an outside force.
What is Newton’s First Law?
This force is the centripetal force for an object in orbit.
What is gravity?
The only force acting on an object in projectile motion.
What is gravity?
The equation that describes centripetal force.
What is Fc=mv2/r?
A change in velocity due to a curve in its direction.
What is centripetal acceleration?
The time for an object to make one complete circle or orbit.
What is the period?
The direction in which a projectile moves at a constant speed.
What is horizontal?
The equation that can be used with the horizontal velocity to calculate the range of a projectile.
What is x=vxt?
(vx means the velocity in the x-direction)
The reason a bullet and a bowling ball dropped from the same height will hit the ground at the same time.
What is the fact that they have the same vertical acceleration, no initial velocity, and travel the same distance? (Mass has no effect on these variables).
When a road is "banked", this force is added to the friction force to provide additional centripetal force.
What is gravity? (Technically, the x-component of gravity)
The component of the motion of a projectile that has acceleration.
What is the vertical component?
The equation that can be used with the vertical velocity to calculate the time of flight of a projectile.
What is y=viyt+(1/2)at2?
(viy means initial velocity in the y-direction)
What is air resistance?
The velocity of an object that moves around a circle with a radius of 0.5 meters in 4 seconds.
What is 0.79 m/s?
The range of an object that is launched with a horizontal velocity of 5 m/s, and which is in the air for 3 seconds.
What is 15 meters?
When calculating time of flight and range for a projectile, why do we use viy for the initial vertical velocity but only vx for the initial horizontal velocity?
Because the vertical velocity changes, so we need to specify the starting value with an "i" (for "initial") but the horizontal velocity doesn't change, so any value of the velocity is the same.