All Flashcards
What is the effect of the net force pointing towards the center of the circle?
The object moves in a circular path.
What happens if you forget to include all relevant forces in your FBD?
Incorrect analysis of the motion and incorrect calculations of net force.
What is the effect of doubling the speed of an object in circular motion?
The centripetal force required quadruples.
What happens when the normal force is greater than weight at the bottom of a loop?
You feel heavier.
What happens if the speed of the block is doubled in the Free Response Question?
The new tension in the string will be 144 N.
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 drawing an FBD?
- Represent the object as a dot. 2. Draw arrows outward from the dot to represent forces. 3. Label each force.
How do you choose a coordinate system for circular motion FBDs?
Choose a coordinate system where the positive x or y axis points towards the center of the circle.
What is the process for analyzing forces at the top of a loop in a roller coaster problem?
- Identify that both normal force and gravity point downwards. 2. Write the net force equation: Fnet = Fn + Fg.
What is the process for analyzing forces at the bottom of a loop in a roller coaster problem?
- Identify that normal force points upwards and gravity points downwards. 2. Recognize that normal force is greater than gravity. 3. Write the net force equation: Fnet = Fn - Fg.
What is the process for analyzing forces at the sides of a loop in a roller coaster problem?
- Identify that normal force points towards the center and gravity points downwards. 2. Recognize that normal force provides the centripetal force. 3. Write the net force equation: Fnet = Fn.