force Flashcards
What is force?
Force can cause a stationary object to move, can cause a moving object to move more quickly or slowly, and can cause a moving object to change direction.
The unit of force is newtons.
What is the difference between weight and mass?
Weight is the force pulling objects towards the center of the Earth, while mass is the amount of matter in an object.
Weight is measured in newtons, mass is measured in kilograms or grams.
Does weight have a direction?
Yes, weight has a direction, while mass does not have a direction.
How does weight change with altitude?
Weight gets smaller as you rise upwards from ground level, while mass remains constant.
How does weight vary on different planets?
Weight is different on other planets depending on their gravitational force.
What is the relationship between mass and weight?
Weight can change due to a change in mass or the local gravitational force.
Mass x 10.
What is the effect of different weights on a spring?
The effect of different weights on a spring is that they are directly proportional.
What does the moment of a force refer to?
The moment of a force refers to a force causing something to spin.
What is a lever?
A lever is any rigid body that is free to move about a fixed point.
Smaller force x larger distance = larger force x smaller distance.
What is pressure?
Pressure is the physical force exerted on an object.
Pressure = force/area; unit of pressure is Ncm-2/pascal.
When is work done?
Work is done if a force results in an object moving a distance.
What is the formula for work?
The formula for work is Force x distance.
The unit of work is Joule.
What is power?
Power is the rate at which work is done.
Power = work done/time; unit of power is Watts.
