Lesson 12: Gravity Flashcards
1
Q
What is “weight?”
A
- Weight is the force acting on an object due to gravity.
2
Q
Why is there a force of gravity close to the Earth?
A
- This is because of the gravitational field around the earth.
3
Q
What does the weight of an object depend on?
A
- Gravitational field strength and mass of that object (at a certain point.)
4
Q
What is the equation for working out weight?
A
W = mg
5
Q
What is the “centre of mass” of an object?
A
- Centre of mass is the single point (on an object) where the force of weight may be considered to act.
6
Q
True or False
The weight and mass of an object are inversely proportional.
A
- The weight and mass of an object are directly proportional.
7
Q
How is weight measured?
A
- Using a calibrated spring-balance (ie. a newtonmeter.)
8
Q
What is another way to describe a “newton meter” other than saying: “newton meter?”
A
- Calibrated spring balance.
