Dynamics Flashcards
Describe the instantaneous experiment
Instantaneous speed is measured at both lg1 and lg2 when the mask breaks the light barrier. The time for it to pass from lg1-lg2 was measured by the lg, alba interface and a laptop. The acceleration is measured by
Instantaneous speed lg1-instantaneous speed lg2/ time to pass from lg1-lg2
Describe an average speed experiment
The experiment was set up as shown. The distance between the two light gates was measured with a meter stick and the time for the mask to pass from light gate one to light gate two was measured by the light gates, the alba interface and the laptop.
The average speed is found by
Distance between lg1 and lg2 / time between lg1 and lg2
How do you find displacement in a velocity time graph
Area under vt graph
Newton’s third law
Every action has an equal and opposite reaction
Gravitational field strength
The gravitational force or weight per unit mass
Newton’s second law
When the forces acting on an object are unbalanced the obect will accelerate in the direction of the unbalanced force
F=ma
Work done
A form of energy which describes the force applied to move an object a certain distance
Gravitation al potential
The energy stored by an object as a result of its vertical position above the surface of the Earth
Kinetic energy
The energy possessed by a moving object
Principle of conversion of energy
Energy cannot be created or destroyed, but only transferred from one form to another
Freefall
The movement of any object under the influence of gravity alone
terminal velocity
For an object to freefall at a constant speed is reached when upward force on the object is balanced by the downward force on the object
Projectile motion
The curved path taken by projectile due to its constant horizontal velocity and constant vertical acceleration
Velocity
The displacement per unit time
Accelerati
The change in velocity per unit time
