Phy 1 - Translational Motion Flashcards
How do you calculate displacement ?
The change in displacement is the final distance minus the initial distance
Define distance in terms of Physics ?
The magnitude or size of displacement between two positions
Define distance travelled in terms of Physics ?
The total length of the path travelled between two positions. This is not always the same as displacement.
Define displacement ?
The change in position of an object
Define 10 Scaler Quantities ?
Distance, Speed, Time, Temperature, Mass, Area, Volume, Energy, Entropy, Electric charge
Define 7 Vector Quantities ?
Displacement, Acceleration, Momentum, Electrical Field, Velocity, Force, Gravitational Field
Define Speed in terms of Physics ?
The rate of change of distance in relation to time
Is Speed a scaler or a Vector quantity ?
Scaler
Define Velocity in terms of Physics ?
The rate of change of displacement over time
Is Velocity a Scaler or a Vector ? Why ?
It is a vector, because it has both direction and magnitude
Define Instantaneous Velocity ?
The Velocity at a given point in time
How do you calculate Instantaneous Velocity ?
Calculated from a Distance/Time graph: For a straight line graph it is the average slope of the line that bisects the time in question. For a curved line graph it is the slope at the specified time, solved by using Pythagoras’ Theorem.
Define acceleration
The rate of change of velocity with respect to time
What is the formula for velocity ?
Is velocity a scaler or a vector ? What are its unit ?
Vector because it has both magnitude and direction
ms-2
What is the term for negative acceleration
Deceleration
How do you calculate the area of a rectangle ?
How do you calculate the area of a triangle ?
How would you calculate the area under a curve of a graph ?
Count the boxes !
How would you calculate displacement from a velocity/time graph ?
Take the area under the line or the curve of the graph
What is meant by uniformly accelerated motion ?
The magnitude and direction of the acceleration of a system are solely determined by the exterior forces acting on the system.
If the magnitude of these forces is constant, the magnitude of the accelereation will be constant, which results in uniformly accelerated motion.
What is meant by translational motion ?
The motion of the centre of gravity of a system through space.
What is the formula for uniformly accelerated motion ?
X = X0 + VOt + 1/2 at 2
What is Kinematics ?
The study of objects in motion with respect to space and time
With respect to kinematics, v = ?
V = Vo + at
