PW Flashcards
Describe qualitatively the relationship between force, mass and acceleration
(F = M x A) - A force is necessary to accelerate an object
- The more force that is applied, the more acceleration
- The heavier an object is, the more force needed to accelerate it
Describe qualitatively the relationship between distance speed and time
(S = D / T) increasing the distance covered in the same amount of time increases speed.
What are forces?
A push, pull or twist that causes an object to accelerate, decelerate, change direction or change shape
What is the relationship between speed, distance and time?
Speed = Distance/time Distance= speed x time Time = Distance/speed
What is velocity?
The speed and direction of a moving object.
How is the average speed calculated?
The total distance traveled by the total time taken. D/S
What is Newton’s first law of motion?
An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed unless acted upon by an unbalanced force. This law is often called “the law of inertia”`
What is Newton’s second law of motion?
Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).
What is Newton’s third law of motion?
For every action there is an equal (in size) and opposite (in direction) reaction.
What is the net force?
A Net Force is defined as the sum of all the forces acting on an object. There may be several forces acting on an object, and when you add up all of those forces, the result is what we call the net force acting on the object.
What is inertia?
Inertia is an object’s resistance to change in motion, depending on its mass. The greater the mass, the greater the inertia.
The sum of all the forces on an object is?
Net force.
What is force?
Any influence that causes an object to change its shape or motion.
What is an unbalanced force?
An external force that changes the motion of an object.
