Newton's second laws
Calculate the force if a 5 kg object accelerates at 2 m/s2
10N
a push or pull that one body exerts on another
force
For every action there is an equal and opposite reaction force
Newton's third law of motion
what force causes an object to try and resist change
Inertia
what force opposes the motion of objects
friction
What is the force called that attracts any two objects
Gravity
forces that are not equal -
for example 10 N left vs 30 N right
unbalanced forces
An object at rest will remain at rest and an object in motion will continue moving at a constant velocity unless acted upon by a net force
Newton's First Law
A car parked on a large hill has this type of friction occurring.
static
If you push a wall with a force of 50 N how much force does the wall exert on you?
The wall exerts an equal and opposite force of 50N.
What is the acceleration constant that all objects on Planet Earth fall at (neglecting air resistance?
9.8 m/s/s
What happens if the net force acting on an object is zero
The object's movement will not change or it's at constant speed
The acceleration of an object is directly proportional to the net force acting on it and inversely proportional its mass
Newton's 2 law
Type of friction occurring when a paper airplane is thrown
fluid
This is the equation for momentum. Write it out in words for bonus.
p = m*v
momentum = mass times velocity
A rocket of mass 2,000 kg2,000 \, \text{kg}2,000kg experiences a net upward force of 12,000 N12,000 \, \text{N}12,000N. What is the rocket's acceleration? (Ignore air resistance.
a=F/m=12,000/2,000=6m/s2
.
What is the net force if:
10 N up
10 N right
10 N down
5 N left
5 N to the right
The equation used to calculate WEIGHT is this. You can also put it in words for BONUS points.
F (w) = m*a
Weight = mass times acceleration (9.8 m/s/s on Earth)
Structure that increase friction on a surface (starts with an "M" and is TINY.
microwelds
This is the momentum of a dolphin (50 kg) traveling at a velocity of 10 m/s. UNITS MATTER.
What is 500 kg*m/s?
Gravity does this as mass and distance goes up
Increases
How do you calculate Net Force
You find the sum of all forces acting on the object
How many laws of motion did Newton write?
three
Another word for inertia (remember the water balloon lab?). Remember - do you really want to get up and move off that couch?
laziness
Says that momentum is never created or destroyed.
Law of conservation of momentum