force
a push or pull that acts on an object
inertia
the tendency of an object to resist a change in its motion
friction
a force opposes the motion of another object; making the object slow down, or giving it traction to get moving
speed
how fast the position of an object changes with time at any moment; calculated s=d/t
Newton's First Law of Motion
An object at rest tends to stay at rest; an object in motion tends to stay in motion.
velocity
speed AND direction
acceleration
a change in velocity/speed
gravity
A force of attraction between objects that is due to their masses.
mass
the measure of the amount of matter in an object
acceleration/force relationship
the more force you apply, the greater the acceleration
acceleration/mass relationship
the greater the mass, the more force necessary to get an object to accelerate
As force increases, acceleration:
increases
F=
ma
As mass increases, acceleration
decreases
A 35 N force would acceleration a 7 kg mass at:
5 m/s/s
What mass would a 50 N force accelerate at 25 m/s/s?
2 kg
As the mass of a planet increases, its gravitational force:
increases and it would have a greater gravity
Which object would accelerate the fastest if the same force was applied: 1 kg, 4 kg, 6 kg, 10 kg
1 kg: As mass decreases, acceleration increases
Which force would produce the greatest acceleration on a 5 kg mass: 1 N, 4 N, 6 N, 10 N
10 N: As force increases, acceleration increases