Definitions I
A push or a pull that is needed from an external source to change an object’s state of motion
Force
A natural inclination for an object to resist a change in its state of motion
Inertia
Horizontal displacement
Range
What force is required to accelerate a 1200 kg car at 4 m/s2?
4800 N
A small truck has a mass of 1800 kg, how much force does it need to produce to be able to accelerate at 1×9 m/s2?
3420 N
The summation of all forces acting on an object
The path of a projectile
Trajectory
Sensation that occurs when a person experiences no contact forces whatsoever
Weightlessness
What happens when a force is balanced?
The object is either not moving, or moving at a constant speed.
Mary pulls upward with a force of 80 N, and the object she is trying to lift has a weight of 90 N. Is she able to lift the object? Yes or no?
NO.
The “thickness” or resistance of flow within liquids
Viscosity
Two forces are equal in magnitude and are directionally opposite of each other
Balance Forces
“For every action there is an equal and opposite reaction.”
Newton's Third Law
A cyclist and his bike have a combined mass of 82 kg. If a force of 205 N can be applied, at what rate can the cyclist accelerate?
2.5 m/sec/sec
If force is unbalanced, then what happens to the object?
It will be accelerating.
“The acceleration of an object produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and is inversely proportional to the mass of the object.”
Newton's Second Law
An applied force to an object that causes it to accelerate
Unbalanced Force
Forces that exist between objects that are physically in contact with each other
Contact Forces
It is accelerating 35 N
A 2×0 kg bowl strikes the stationary ‘jack’ whose mass is 1×0 kg during a game of bowls. It is a head on collision, and the acceleration of the jack is found to be 25 m/s2 north. What is the acceleration of the bowl?
12.5m/sec/sec
“An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless it is acted upon by an external unbalanced force.”
Newton's First Law
Visual representation of force vectors that identify both the magnitude and direction of each force acting on an object
Free Body Diagrams
The force that is transmitted from an object when it interacts with another object through a push or a pull
Applied Force
Calculate the magnitude of the resultant of a pair of 25.0km/hr velocity vectors that are at right angles to each other
35.4km/hr
A professional baseball player hits a ball due east with a speed of 55.0m/s. While the ball was in the air it experienced a 7.20m/s northern wind. What is the magnitude of the baseball’s resultant velocity?
55.5m/s