1st Law
Complete the sentence:
If zero is the net force when acting on an object, the object remains____
remains at rest
A net force acting on an object causes the object to accelerate ____________
in the direction of the net force
complete the sentence:
every action has an equal and_____
opposite reaction
what is the formula for weight?
f=ma
It will make the friction greater
If an object is at rest, it will not move until...?
you/something gives it a push
what does the formula F=MA stand for?
force= mass X acceleration
all moving objects have ____
momentum
what is weight?
the force of gravity on an object
The greater the force pushing the two objects together=
the greater the friction
When the object is moving, it will not stop until...
another force stops it
the greater the mass=
the greater the force needed
momentum:
mass in motion
what is mass?
the amount of matter in an object
What is static friction?
Static friction= force between two surfaces that are not moving past each other
Something/an object does not change unless the forces...
are unbalanced
what is F=MA measured by?
force= newtons, mass=kg, acceleration= m/s²
equal and opposite
9.8m/s² is the formula for_____
9.8m/s² = acceleration (to find weight)
What is sliding friction?
Sliding friction= force between two surfaces that are sliding past each other
What would inertia at rest have to do with fruit falling from a tree?
The branches of the tree are being shaken
If the mass of an object is 3,000kg and the acceleration is 2m/s², what is the force?
F=6,000N
If a Jet (airplane) is moving forward where is the exhaust moving?
backwards
solve this equation:
find the weight of a box with a mass of 35kg.
f=ma
f=(35)(9.8)
f=343N
What is rolling friction?
Rolling friction= force between a rolling object and the surface it rolls on