Linear motion Flashcards
What is the difference between scalar and vector measurements?
Scalar is size but vector also measure direction.
What is the formula for acceleration?
Change in velocity / Change in time.
What is the formula for momentum?
Mass x velocity.
What is meant by internal forces?
Forces generated by skeletal muscle.
What is meant by external forces?
Forces from outside of the body.
What is meant by vertical forces?
Forces that act upwards or downwards.
What is meant by horizontal forces?
Forces that act sideways upon things.
What is a reaction force?
A force always equal and opposite to the action force provided.
What is the formula for velocity?
Displacement/ Time.
How does velocity impact air resistance?
Increase in velocity = Increase in air resistance
What factors increase friction of an object?
Roughness of the surface, mass of the object, and temperature of the surface.
On a graph of motion, what always stays the same?
Time is always on the X axis.
What is meant by net force?
The resultant force that is acting upon the body after all forces have been considered.
Friction > AR. What will happen to the runner?
They will accelerate.
What is the formula for impulse?
Force x time.
What is inertia?
The resistance an object has to change its state of motion.
What is Newton’s first law of inertia?
A force is required to change the state of motion of an object.
What is Newton’s second law of acceleration?
F=MA. The size and direction of the force determines the size and direction of the acceleration of an object.
What is Newton’s third law of reaction?
To every action, there is an equal and opposite reaction.
What is the centre of mass?
The point of balance in an object.
How does the height of the centre of mass of an object affect its stability?
Lowering the centre of mass will increase the object’s stability.
How does the position of the line of gravity affect the stability of an object?
The line of gravity should be in the middle of the base of support to provide stability.
How does the mass of the object affect its stability?
The greater the mass = the greater the inertia = the greater the stability.
How does the area of the base of support affect the stability of an object?
A higher amount of contacts points means a greater area of the base of support and more stability.
