Forces topic test Flashcards
What is a resultant force?
When two or more forces act on an object, the resultant force can be found by adding up the individual forces.
Contact forces?
Contact forces arise between two objects which are in contact.
Non-contact forces?
Non-contact forces act between two objects which are not in contact.
What is newtons first law?
Newton’s First Law states that a body will remain at rest or continue to move at constant speed in a straight line, unless a resultant force acts on it.
What do unbalanced forces cause?
This simply means that unbalanced forces will cause:
acceleration
deceleration
change in direction
What is tension?
An object that is being stretched experiences a
tension
force. For example, a cable holding a ceiling lamp.
Resultant force equation?
Resultant force F = mass x acceleration
F = resultant force in N
m = mass in kg
a = acceleration on m/s
Contact forces eg?
-Frictional force
-Tension force
-Normal Force
-Air Resistance Force
-Applied Force
-Spring Force
Non-contact forces eg
-Gravitational force.
-Magnetic force.
-Electrostatics.
-The nuclear force
What is the parallelogram of forces?
The parallelogram of forces is a scale diagram of two force vectors which is used to find the resultant of two forces that are not parallel.
What is resolving forces?
Two forces can be added together to find a resultant force. A single force can be resolved (broken down) into two
component forces at right angles to each other.
