All Flashcards
In a roller coaster at the top of a loop, which direction do the normal force (Fn) and gravity (Fg) point?
Both normal force (Fn) and gravity (Fg) point downwards (towards the center of the circle).
In a roller coaster at the bottom of a loop, which direction do the normal force (Fn) and gravity (Fg) point?
Normal force (Fn) points upwards (towards the center), gravity (Fg) points downwards.
In a roller coaster at the side of a loop, which direction do the normal force (Fn) and gravity (Fg) point?
Normal force (Fn) points towards the center of the circle (left or right), gravity (Fg) points downwards.
What is the difference between tangential and centripetal acceleration in uniform circular motion?
Tangential acceleration: Change in tangential velocity (zero in uniform circular motion). Centripetal acceleration: Acceleration directed towards the center of the circle, causing the object to change direction.
What are the steps to draw an FBD?
- Represent the object as a dot. 2. Draw arrows outward from the dot to represent forces. 3. Label each force with its appropriate symbol.
How do you analyze forces in uniform circular motion using an FBD?
- Draw the FBD. 2. Choose a coordinate system with one axis pointing towards the center of the circle. 3. Apply Newton's Second Law, , where is the net force towards the center (centripetal force).