P 3. Dynamics Revamp Flashcards
What are the 8 actions a force can produce?
(3 min)
- Pushing
- Pulling
- Lifting
- Bending
- Twisting
- Tearing
- Stretching
- Squeezing
What are the 8 types of forces?
(3 min)
- Weight
- Magnetic
- Upthrust
- Air resistance/drag
- Electrostatic
- Friction
- Thrust/driving force
- Tension
How to find resultant force in general?
Based on which has more force on either direction
What is Newton’s 1st Law?
(3-way)
- An object remains at state
- or at constant speed
- unless acted upon an external force
What is Newton’s 2nd Law?
(Complex)
F = (mv - mu)/t
For Newton’s 2nd law, what does the size of acceleration depend on?
(2 things)
- Size of resultant force acting on the body
- Size of the mass of the body
If acceleration of an object is directly proportional to the size of the resultant force acting, what does it mean?
As acceleration increases, size of the resultant force increases
How can u tell if it’s directly proportionally in a graph?
Straight line
Newton’s 2nd Law simple form?
Σ F = m x a
Newton’s 2nd Law simple form expressed in words?
Resultant (N) = Mass (kg) x acceleration (m/s2)
Definition of the Newton
(3-way)
- A resultant force of 1 newton is produced
- when a mass of 1kg accelerates
- at 1ms-2
Define mass
(3 points)
- Measure of matter in your body
- Measured in kg
- Is always the same
Define weight
(3 points)
- The force due to gravity
- Measured in newtons (N)
- Changes depends on the gravitational field of an object
Weight = ?
mg
Weight = ?
(expressed in words)
weight = mass x gravity
What is Newton’s 3rd Law?
Every action has an equal and opposite reaction
What does g usually equal to?
9.81 ms-2