| One of the characteristics that make up a 'Newton's third law pair is forces of the same type. Give 5 examples of this? | 1. Gravitational forces
2. Electrical forces
3. Contact forces
4. Tension forces
5. Magnetic forces |
| One of the characteristics that make up a 'Newton's third law pair is forces of the same type. Give 5 examples of this? | 1. Gravitational forces
2. Electrical forces
3. Contact forces
4. Tension forces
5. Magnetic forces |
| What is the formula for resultant force and how is it written in symbols? | mass x acceleration
F = ma |
| What is the symbol and unit for resultant force | Symbol = F
Unit = N (newtons ) |
| What is the symbol and unit for mass | Symbol = m
Unit = kg (kilograms) |
| What is the symbol and unit for acceleration | Symbol = a
Unit = m s^-2 (meters per second squared) |
| What is Newton's second law of motion? | For a body of constant mass, its acceleration is directly proportional to the resultant force applied to it |
| The equation a = F / m relates acceleration, resultant force and mass. What does it show in particular? | It shows that the bigger the force, the greater the acceleration it produces |
| What is inertia? | the mass of an object is a measure of its inertia, or its ability to resist any change in its motion
Greater the mass, smaller the acceleration that results |
| Define the centre of gravity of an object | Centre of gravity of an object is defined as the point where its entire weight appears to act. |
| What effect does the smaller mass of the moon compared to Earth have on its gravity? | It has weaker gravity |
| What is the acceleration of freefall on the Moon? | gMoon = 1.6 m s^-2 |
| What is the symbol, unit and base unit of mass | Symbol = m
Unit = kg
In terms of base units = kg |
| What is the symbol, unit and base unit of weight? | Symbol = mg
Unit = N
In terms of base units = kg m s^-2 |
| In the 17th century Galileo came to 2 conclusions about the natural motion of objects, what are they | 1. An object at rest will stay at rest, unless a force causes it to start moving
2. A moving object will continue to move at a steady speed in a straight line, unless a force acts on it. |
| What is uniform motion? | Natural state of motion of an object |
| What is Newton's first law of motion? | If no resultant force acts on an object it will not accelerate. The object will either remain stationary or it will continue to travel at a constant velocity. |
| What is known as terminal velocity? And what is it approximately ? | Maximum velocity
120 miles per hour (about m s^-1) |
| Air resistance is just one example of (?) that objects experience when they move through a fluid, a liquid or a gas | resistive force |
| What is contact forces? | When two objects touch each other, they exert a force on the other |
| What is Newton's third law of motion | When 2 objects interact, each exert a force on the other, forces are equal and opposite to each other |
| What are the 4 characteristics that 2 forces have that make up Newton's third law pair | 1. Act on different objects
2. Equal in magnitude
3. Opposite in direction
4. Forces of the same type |
| One of the characteristics that make up a 'Newton's third law pair is forces of the same type. Give 5 examples of this? | 1. Gravitational forces
2. Electrical forces
3. Contact forces
4. Tension forces
5. Magnetic forces |
| What is the base unit and the symbol for length? | Symbol = x,l,s and so on
Base unit = m (meter) |
| What is the base unit and symbol for mass? | Base unit = kg (kilograms)
Symbol = m |
| What is the base unit and symbol for time | Base unit = s (second)
Symbol = t |
| What is the base unit and symbol for electric current? | Base unit = A (Ampere)
Symbol = I |
| What is the base unit and symbol for thermodynamic temperature? | Base unit = K (kelvin)
Symbol = T |
| What is the base unit and symbol for amount of substance? | Base unit = mol (mole)
Symbol = n |
| What is the equation we use to define Newton? | F = ma |
| When each term in an equation has the same base units the equation is said to be? | homogeneous |
| Does the prefix come before or after the unit | before |
| What is the symbol and the multiple for the prefix kilo? | Multiple = 10^3
Symbol = k |
| What is the symbol and the multiple for the prefix mega? | Symbol = M
Multiple = 10^6 |
| What is the symbol and the multiple for the prefix giga? | Symbol = G
Multiple = 10^9 |
| What is the symbol and the multiple for the prefix tera ? | Symbol = T
Multiple = 10^12 |
| What is the symbol and the multiple for the prefix deci ? | Symbol = d
multiple = 10^-1 |
| What is the symbol and multiple for the prefix centi? | Symbol = c
Multiple = 10^-2 |
| What is the symbol and multiple for the prefix milli? | Symbol = m
Multiple = 10^-3 |
| What is the symbol and multiple for the prefix micro? | Symbol = µ
Multiple = 10^-6 |
| What is the symbol and multiple for the prefix nano? | Symbol = n
Multiple = 10^-9 |
| What is the symbol and multiple for the prefix pico? | Symbol = p
Multiple =10^-12 |
