newton´s laws and forces Flashcards
What is newton’s first law of motion
An object will remain at rest or move at a constant velocity unless acted upon by a resultant/net force.The object in motion continues in motion with same speed and in same direction unless acted upon by a non-zero resultant force.
What is the condition needed for constant velocity
The resultant force must be 0 for constant velocity, according to newton’s first law.
what does magnitude mean
size or quantity
what is newton’s third law of motion and what are the forces on each interacting object?
When two objects interact, they exert equal and opposite forces on each other.The forces acting on the interacting objects are always of the same type.
What happens when two electrons interact
Electrons have a negative charge, so they exert an electrostatic repulsive force on each other.The two electrons experience same magnitude of force but in opposite directions
What happens when a North and South pole in magnet interact
They exert magnetic forces on each other, same magnitude but opposite direction.
What happens when someone jumps off a building towards bottom
The force exxerted by the person on earth is their weight.The force exerted by earth on the person is gravitational force.Both forces have same magnitude, but opposite directions.
What are the 4 fundamental forces used to describe interactions
4 Types of fundamental forces:1. gravitational2. electromagnetic3. strong nuclear4. weak nuclear
What is the range of the nuclear forces
extremely short range
What force is exerted from pushing hands together
electrostatic repulsive forces between the electron clouds around the atomic nuclei in hands.
Explaing how newton’s laws can be used to explain how a person runs on a road
The runner exerts a backward force on the earth.According to newton’s third law the Earth exerts an equal Forward force on the person.
Define a newton
force required to accelerate a one-kilogram mass by one meter per second squared
What is newton´s 2nd law of motion
The resultant force on an object is equal to its rate of change of momentum
