forces
Defined as a push or pull acting on an object
Force
A measure of the amount of work that can be done in a given amount of time.
Power
What is exerted by the air in the atmosphere is the greatest at earths surface.
Pressure
Property of a moving object that makes it hard to stop.
Momentum
Energy is either made or lost over time. TRUE OR FALSE
False
Force that opposes motion
Friction
Work= force x Distance
work
Average sea level is
101 K PA
Calculate Momentum
Multiply it's mass in kg by it's velocity in meters per second
Always does less work on an object than the user does.
MAchine
Si unit of force
Newton
si unit for work
joule
When you inhale the diaphragm
contracts
SI unit for momentum is
kg x m/s
How many types of simple machine are there
Six
Why is force a vector
Because it has both size and Direction
you do more work when the object is
heavier
when you exhale the lungs are
compressed
Tendency of an object to resist a change in it's motion.
Inertia
Machine that combines 2 or more
Compound Machine
2 things that affect friction
Power can be calculated from
work and time using the equation
SI unit for pressure is
Pascal
F= mxa
CALCULATING NET FORCE
Amy uses 20n of force to push a lawn mower 10 meters. How much work does she do?