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Questions and Answers
What is the relationship between static friction and normal force?
What is the relationship between static friction and normal force?
- Static friction exceeds the normal force when in motion.
- Static friction does not depend on the normal force at all.
- Static friction is always equal to normal force.
- Static friction can be less than or equal to the product of the coefficient of static friction and normal force. (correct)
Using Newton's second law, what can be inferred about the applied force in a frictional scenario?
Using Newton's second law, what can be inferred about the applied force in a frictional scenario?
- Applied force has no relation to mass or acceleration.
- The applied force is always greater than the frictional force.
- The difference between applied force and frictional force equals the mass times acceleration. (correct)
- The applied force equals the frictional force.
What does the kinetic friction formula represent?
What does the kinetic friction formula represent?
- The total weight of an object in motion.
- The force that opposes the motion of two surfaces in contact during sliding. (correct)
- The maximum force that can be applied before an object starts moving.
- The force needed to keep an object at rest.
What is the correct formula to find acceleration in a two block system with tension and friction?
What is the correct formula to find acceleration in a two block system with tension and friction?
If the coefficient of kinetic friction is known, what can be calculated?
If the coefficient of kinetic friction is known, what can be calculated?
Which of the following is true regarding the mass of block B in a hanging scenario?
Which of the following is true regarding the mass of block B in a hanging scenario?
In a system where blocks A and B are connected, what forces need to be considered for block A?
In a system where blocks A and B are connected, what forces need to be considered for block A?
What happens to static friction as the applied force increases?
What happens to static friction as the applied force increases?
What is the average velocity formula?
What is the average velocity formula?
How is displacement represented mathematically?
How is displacement represented mathematically?
Which formula represents average acceleration?
Which formula represents average acceleration?
In the context of free falling bodies, what does $h$ represent in the equation $h = \frac{1}{2}gt^2$?
In the context of free falling bodies, what does $h$ represent in the equation $h = \frac{1}{2}gt^2$?
What is the gravitational force formula?
What is the gravitational force formula?
Which equation is used to find the final velocity in uniformly accelerated motion?
Which equation is used to find the final velocity in uniformly accelerated motion?
What is the formula to calculate total distance traveled using average speed?
What is the formula to calculate total distance traveled using average speed?
What factor is represented by $g$ in the free fall equations?
What factor is represented by $g$ in the free fall equations?
What does the symbol $F_N$ represent in physics?
What does the symbol $F_N$ represent in physics?
How is the normal force calculated when the object is accelerating?
How is the normal force calculated when the object is accelerating?
Which of these options correctly identifies how acceleration is typically represented?
Which of these options correctly identifies how acceleration is typically represented?
What is indicated by the relationship $v_f^2 = v_i^2 + 2ad$?
What is indicated by the relationship $v_f^2 = v_i^2 + 2ad$?
Which method is used to find tension when considering both gravitational and acceleration forces?
Which method is used to find tension when considering both gravitational and acceleration forces?
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Study Notes
Unit Conversion
- 0.45 liters is equivalent to 450 milliliters
Average Velocity
- Average velocity can be calculated using:
- distance traveled divided by elapsed time
- change in position divided by change in time
Average Speed
- Average speed can be calculated by dividing total distance traveled by elapsed time
Acceleration
- Acceleration can be calculated using:
- final velocity minus initial velocity divided by change in time
Constant Acceleration
- Constant acceleration is also known as uniformly accelerated motion
Free Falling Bodies
- Velocity is affected by gravity
- v = gt
- h = (1/2)gt^2
- Time of fall can be calculated using:
- t = √(2h/g)
- Velocity of fall can be calculated using:
- v = √(2gh)
Newton's Laws of Motion
- Newton's second law of motion:
- Force equals mass times acceleration
- Acceleration can be calculated using:
- force divided by mass
- Mass can be calculated using:
- force divided by acceleration
Gravitational Force
- Gravitational force can be calculated by:
- mass times gravity
Normal Force
- Normal force is the force exerted by a surface on an object in contact with it.
- The normal force can be calculated by:
- mass times the sum of gravity and vertical acceleration
Coefficient of Friction
- Friction is a force that opposes motion
- Static friction is the force that must be overcome to start motion
- Kinetic friction is the force that opposes motion when an object is moving
Tension
- Tension is the force exerted along the length of a stretched cable or rope
Newton's Second Law Applied
- Newton's second law of motion can be applied to a scenario involving applied force, frictional force, and the resulting acceleration
- Applied force minus frictional force equals mass times acceleration
Two Equation in Two Unknowns
- The two formulas for the tension and acceleration of two objects connected by a rope can be used to solve for the acceleration of the system.
- Acceleration = (mass of heavier object * gravity) / (mass of heavier object + mass of lighter object)
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