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Term 1 Forces
Instruments, Vectors, Scalars, Resultant Forces, Moments, Hooke's Law
| Question | Answer |
|---|---|
| What are scalars? | Quantities that that can be measured and only have magnitude (size). |
| What are vectors? | Quantities that can be measured and have both magnitude(size) and direction. |
| What are some examples of vector and scalar quantities? | Vector: Forces, Displacement, Acceleration, Velocity and Momentum Scalars: Time, Distance, Temperature, Speed and Direction |
| What are some contact and non contact forces? | Contact Forces: Tension, Friction, Air resistance and Normal Force. Non-contact: Gravity, Nuclear Force, Electrostatic Force and Magnetism |
| How do you calculate weight? | Weight(N)=Mass(kg) x gravity(N/kg) (W=mg) |
| What does center of mass mean? | This is when all the mass of an object acts at a single point. |
| State the law of the limit of proportionality | The extension of a spring is directionally proportional to the force applied provided that the limit of proportionality is not exceeded. |
| How do you calculate spring constant? | Force(N)= Spring constant(N/m) x Extension(m) F=ke |
| What is a moment and how do you find it? | A force or system of forces may cause an object to rotate. Moment(Nm)=Force(N) x Distance(m) M=fd |
| What does it mean by equilibrium? | This means that both sides on perpendicular distance that is on a pivot is equal in force. Therefore it stays stationary |
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