Newtons law of motion Flashcards
What is the law of inertia?
A body will remain at rest or uniform velocity until acted on by an external force
What is the word ‘inertia’?
Resistance of a body to change its state of motion, the reluctance of a body to start or stop moving
What is the velocity ?
The rate of motion in a particular direction
What is the law of acceleration?
‘The rate of change in momentum (or acceleration) of an object is directly proportional to the force applied to it
Explain acceleration?
Change of velocity divided by momentum
What is momentum?
The quantity of motion possessed by a moving body= M x V
How can we apply the law of acceleration with a sprinter sprinting off blocks?
Any change in velocity (acceleration) is dependent upon the force causing it, this relationship is proportional. In order tp generate a greater acceleration, sports performer must produce a greater muscular force. The sprinter who applies the greatest force to the starting blocks will be the one who leaves the blocks with the greater acceleration.
What is the law of reaction?
‘For every action there is an equal and opposite reaction’
What is the action force?
The force exerted by the performer on another body. The backward and downward force exerted by a swimmer on the blocks at the start of the race.
What is the reactive force?
An equal and opposite force to the action force exerted by the second body on the first. Example; the forward and upward force exerted by the blocks on the swimmer at the start of the race.
What is the reaction force equation?
Weight force+ Muscular force applied by the player
