Forces
What is Newton's first law of motion also called?
Newton's first law of motion is also called the law of inertia
What is Newton's first law of motion?
Objects at rest will stay at rest and objects in motion will stay in motion unless acted upon by an unbalanced outside force.
What is the law of conservation of momentum?
The law of conservation of momentum is says that the total momentum of the objects that interact do not change.
What is momentum?
The momentum of an object is the product of its mass and its velocity. Momentum = Mass x Velocity
What is the net force?
The net force is the overall force on an object after all the forces are added together.
What is Newton's second law of motion?
The net force on an object is equal to the product of its acceleration and its mass. Force = Acceleration x Mass
What two factors does the strength of the friction depend on?
The strength of the friction depends on the types of surfaces involved and how hard the surfaces push together.
What does the strength of the inertia depend on?
The strength of the inertia depends on the objects mass. The greater the mass, the greater the inertia.
What are the 3 types of friction?
The three types of friction are called: sliding friction - when solid surfaces slide over each other, rolling friction - when object rolls over a surface, and fluid friction - object moving through fluid.
What are unbalanced forces?
Unbalanced forces are two or more unequal forces acting upon one object. Unbalanced forces cause motion.
What is weight?
Weight is the force of gravity on a person or object at the surface of a planet. Weight = Mass x Acceleration due to gravity
What happens when two objects collide?
When two object collide in the absence of friction, momentum is not lost.
What is a newton equal to?
1N = 1kg x 1m/s^2
What is a centripetal force?
A centripetal force is any force that cause an object to move in a circular path.
What is a force?
A force is a push or a pull.
What is a projectile?
A projectile is something that is thrown.
What is a satellite?
A satellite is any object that travels around another in space.
What are balanced forces?
Balanced forces are two or more equal forces acting upon one object in opposite directions. Balanced forces do not cause motion.
What is force measured in?
Force is measured in newtons
What are forces described by?
Forces are described by their strength and direction.
What is free fall?
Free fall is when the only force acting upon an object is gravity.
What direction does friction act in?
Friction acts in a direction opposite to the object's direction of movement.
What is friction?
Friction is the force that one surface exerts on another when the two rub together.
What is gravity?
Gravity is the force that pulls objects toward Earth.
What is Newton's third law of motion?
If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction of the first object.
What is inertia?
Inertia is the tendency of an object to resist change.