All Flashcards
What is the definition of 'center of mass'?
The 'average' position of all the mass in the system.
Define 'acceleration'.
The rate of change of velocity.
What is 'Newton's Second Law'?
The law that relates force, mass, and acceleration: F = ma.
Define 'angular tension'.
Tension in strings or ropes that are at an angle to the vertical or horizontal.
What is 'apparent weight'?
How heavy an object feels, which can differ from its true weight (mg) due to acceleration.
What is the difference between true weight and apparent weight?
True weight: The force of gravity on an object (mg). Apparent weight: The force an object experiences due to contact forces, which can differ from true weight when there is acceleration.
What is the effect of upward acceleration on apparent weight?
Apparent weight increases (feel heavier).
What is the effect of downward acceleration on apparent weight?
Apparent weight decreases (feel lighter).
What happens to apparent weight during free fall?
Apparent weight becomes zero (feel weightless).
What is the effect of applying a force on an object with mass?
The object accelerates in the direction of the force (Newton's Second Law).