Vocab
What is the definition of acceleration?
measure of the change in an objects velocity
a force that resists the sliding motion of two surfaces that are touching
friction
A 3 kg toy car accelerates at 4 m/s2. What force is applied to the car?
12N
What is the formula for acceleration (just the letters)?
a = F/m
the sum of all the forces acting on an object
net force
A force of 25 newtons is applied to a 5 kg box. What is the acceleration of the box?
5m/s2
The push or pull on an object
force
simple model to understand systems of objects with any amount of applied forces
free-body diagram
A sled with a mass of 10 kg is pulled with a force of 50 newtons. Calculate its acceleration.
5m/s2
contact force
What unit of measurement do we use to measure force?
Newtons
An object accelerates at 6 m/s2 when a force of 18 newtons is applied. What is the mass of the object?
3kg
Newton's second law of motion
the acceleration of an object is equal to the net force of an object divided by its mass
Newton's first law of motion
an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an outside force
A force of 60 newtons causes an object to accelerate at 3 m/s2. Find the mass of the object.
20kg