Weight Ans Circular Motion Flashcards
What is mass?
Mass is just the amount of ‘stuff’ in an object.
Mass remains the same value anywhere in the universe.
What is the difference between mass and weight?
Mass is a scalar quantity measured in kilograms, while weight is a force measured in newtons.
Weight depends on gravitational field strength.
How is weight calculated?
Weight (N) = mass (kg) × gravitational field strength (N/kg).
Gravitational field strength varies with location.
What is the gravitational field strength formula?
g = W ÷ m
This formula rearranges the weight equation to find gravitational field strength.
What is the weight of a 2.0 kg chicken on Earth if g = 10 N/kg?
20 N
Weight is calculated as W = m × g = 2.0 × 10.
What is the gravitational field strength of a planet if a 2.0 kg chicken weighs 16 N?
8.0 N/kg
This is calculated using g = W ÷ m.
What is velocity?
Velocity is both the speed and direction of an object.
It is a vector quantity.
What happens to velocity when an object travels in a circle at constant speed?
The object is constantly changing direction, so it is constantly changing velocity and accelerating.
This requires a resultant force acting on the object.
What is centripetal force?
The force that keeps an object moving in a circle, acting towards the center of the circle.
It is essential for circular motion.
True or False: Weight is constant regardless of location.
False
Weight changes depending on the strength of the gravitational field.
Fill in the blank: Weight is a force due to ______.
[gravity]
Weight changes based on the gravitational field.
What is the gravitational field strength on the Moon?
~1.6 N/kg
This is significantly lower than on Earth.
How does mass affect weight?
Weight depends on mass and the strength of the gravitational field.
More massive objects create stronger gravitational fields.
What tools are used to measure weight?
Calibrated spring balance or newton meter.
These devices measure the force acting on an object due to gravity.
