physical science ch 12
Terms
undefined, object
copy deck
- sliding friction is less than
- static
- ----><----=0
- zero force/ equal force
- Newton's 2nd Law
- acceleration of an object is equal to the net force action on it divided by the objects mass
- projectile motion
- the motion of a falling object after its given an initial forward velocity
- ----->----> = ---->
- adding forces
- known fluids are
- water and mixture of air
- a force can cause
- a resting object to move or it can accelerate a moving object by changing the objects speed or direction
- terminal velocity
- constant velocity of a falling object when the force of air resistance equals the force of gravity
- earths gravity acts downward
- toward the earths core
- projectile motion
- a ball is thrown and is already on its way down
- force
- push or pull that acts on an object
- wight formula
- mass X acceleration due to gravity
- Newtons 1st Law
- any object in motion in motion will stay in motion; any object not in motion will remain at rest
- static friction always acts in the direction
- OPPoSITE to that of the applied force
- example of a zero net force
- TUG OF WAR
- Rolling friction
- change in shape at the point of rolling contact
- air resistance
- fluid friction acting on an object moving through the air
- unbalanced forces
- forces that result when the net force acting on an object is not equal to zero
- what is mass?
- mass is a measure of the inertia of an object;
- Sliding friction
- a force that opposes the direction of motion of an object as it slides over a surface
- law of inertia
- the tendency of an object to resist a change in its motion
- newton formula
- 1m/s^2
- a force is measured in
- newtrons
- gravity causes object to accelerate downward WHEREAS AIR resistence
- acts in the direction opposite
- an objects weight
- the product of the objects mass and acceleration
- balanced forces
- forces that combine to produce net force of zero
- weight
- the force of gravity acting on an object
- 4 types of friction
- static, sliding, rolling, fluid
- as objects fall the upward force of air resistance becomes equal to
- the downward force of gravity
- gravity
- a force that acts between any two masses
- fluid friction
- opposes the motion of an object through a fluid
- the acceleration of an object....
- is ALWAYS in the same direction as the net force.
- --><------ =<----
- subtracting forces
- Acceleration
- acceleration=net force/mass
- what is weight?
- weight is a measure of the force of gravity acting on an object
- static friction
- the friction force that acts on objects that are not moving
- Newtons 2nd Law
- the acceleration of an object is equal to the net force acting on it divided by the objects mass
- newton
- the force that causes a 1- kilogam mass to accelerate at a rate of 1 meter per second each second
- when a round object rolls over a flat floor both the object and the floor are
- bent slightly out of shape
- friction
- a force that opposes the motion of objects that touch as they move past each other
- net force
- the overal force acting on an object after all the forces are cobined
- mass
- a measure of the inertia of an object and depends on the amount of matter the object contains