Dynamics And Space Flashcards
Scalar
Magnitude
Vectors
Magnitude and direction
Examples of scalar
Mass Time Energy Distance Speed
Examples of vector
Weight Force Momentum Displacement Velocity
Acceleration
Velocity of an object change each second
What does force change
The speed
Direction or
Shape
Of an object
What is weight
The force that pulls objects down to the center of the earth
What is friction
The force which acts between touching surfaces and tries to stop them moving
What is tension
The force carried through a stretched rope or wire
What is gravitational field strength
The downward force acting on one kilogram of mass
What is Newton’s first law
If the forces on an object are balanced the motion of an object does not change
What is Newton’s second law
If an unbalanced force acts on a mass the mass accelerates
What is terminal velocity
When forces are balanced and an object is traveling at a constant velocity
What is Newton’s 3rd law
When you apply a force on an object the object will apply and equal and opposite force back on you
What is a projectile
An object with both horizontal and vertical velocities
What happens to the horizontal motion
It travels at a constant speed
What happens to vertical motion
Accelerates downwards at 9.8ms-2
Why do astronauts appear to be floating
The space station astronauts are in is in free fall
It still has horizontal velocity which prevents it from crashing down to earth
What happens if a space shuttle reenters the atmosphere at a too shallow angle
It is reflected
What happens if a space shuttle reenters at to steep an angle
It burns up
What is instantaneous speed
The speed at one particular point
