CPA Physical Science ch 3
if mass of a helicopter is 45oo kg and the net force on it is 18,000 N, what is the helicopter's
acceleration ✔✔4.0 m/s squared
acceleration (in meters/second squared) ✔✔net force (in newtons) / mass (in kilograms)
what is the net force on a dragster with a mass of 900 kg if its acceleration is 32.0 m/s squated
✔✔(am = net force) 28,800 N
a car pulled by a tow truck has an acceleration of 2.0 m/s squared. What is the mass of the car if
the net force on the car is 3,000 N? ✔✔m = net force/ a 1,500 kg
Newton's 2nd Law of Motion ✔✔acceleration= net force divided by mass
friction ✔✔a force that opposes motion between two surfaces that are in contact
the greater the force on an object ✔✔the greater the object's acceleration
friction ✔✔depends on the types of surfaces and the force pressing the surfaces together
what does the force of friction between 2 objects in contact depend on? ✔✔kinds of surfaces
and force pressing them together
microwelds ✔✔areas where surface bumpers stick together, are the source of friction
static friction ✔✔friction that acts on objects that are not moving.
sliding friction ✔✔Friction that occurs when one solid surface slides over another.
air resistance ✔✔the friction acting on something moving through air
gravity ✔✔attractive force between two objects that depends on the masses of the objects
and the distance between them
The law of universal gravitation ✔✔This "law" identified by Isaac Newton during the 17th
century explained WHY the planets remain in orbit around the sun -- It states that every object
if mass of a helicopter is 45oo kg and the net force on it is 18,000 N, what is the helicopter's
acceleration ✔✔4.0 m/s squared
acceleration (in meters/second squared) ✔✔net force (in newtons) / mass (in kilograms)
what is the net force on a dragster with a mass of 900 kg if its acceleration is 32.0 m/s squated
✔✔(am = net force) 28,800 N
a car pulled by a tow truck has an acceleration of 2.0 m/s squared. What is the mass of the car if
the net force on the car is 3,000 N? ✔✔m = net force/ a 1,500 kg
Newton's 2nd Law of Motion ✔✔acceleration= net force divided by mass
friction ✔✔a force that opposes motion between two surfaces that are in contact
the greater the force on an object ✔✔the greater the object's acceleration
friction ✔✔depends on the types of surfaces and the force pressing the surfaces together
what does the force of friction between 2 objects in contact depend on? ✔✔kinds of surfaces
and force pressing them together
microwelds ✔✔areas where surface bumpers stick together, are the source of friction
static friction ✔✔friction that acts on objects that are not moving.
sliding friction ✔✔Friction that occurs when one solid surface slides over another.
air resistance ✔✔the friction acting on something moving through air
gravity ✔✔attractive force between two objects that depends on the masses of the objects
and the distance between them
The law of universal gravitation ✔✔This "law" identified by Isaac Newton during the 17th
century explained WHY the planets remain in orbit around the sun -- It states that every object
