| Question | Answer |
| What were that 7 forces from "Carnival of Forces" | 1. Gravitational Force-Earth
2. Tensional Force-Rubber band
3. Magnetic Force-Magnet
4. Buoyant Force-floats
5. Frictional Force-Friction
6. Applied Force-What you're doing to the object
7. Air Resistance (or air friction)-Something falling |
| What is a contact Force? | A force were the agent touches the receiver (directly of indirectly). |
| What is a noncontact force? | A force where the agent and receiver are not in touch with each other, but can exert a push of pull without any sort of physical contact. |
| Which two forces from "Carnival of Forces" were noncontact? | 1. Gravity
2. Magnetic |
| What two factors affect the amount of air resistance on a falling object? | 1. Weight
2. Surface Area |
| What are the four forces involved in flight and what direction are they pointing in? | Lift
Thrust Drag
Weight |
| What is the difference between mass and weight? | Mass is the amount of matter an object is made up of while weight is the amount of gravitational pull an object has |
| What are the units for mass and weight? | mass: grams (g) of kilograms (kg)
weight: newtons (N) |
| What devices do you use to measure mass and weight? | mass: a balance
weight: a scale |
| What does the Law of Universal Gravitation State? | All objects in the universe attract each other through gravitational force. The size of the force depends on the masses of the objects and the distance between the objects. |
| What is static friction? An example? | When a force is applied to an object but does not cause the object to move. Trying to push your house down the street. |
| What is kinetic friction? An example? | Friction between moving surfaces. Sliding books across a tabletop. |
| What is rolling kinetic friction? | Any thing that has wheels uses rolling kinetic energy (cars, skateboards, tricycles). |
| What is sliding kinetic friction? | When anything slides, like moving a heavy piece of furniture by pushing it. |
| How do you find the net force of an object if the forces are acting in the same direction? | Add all the forces together. |
| How do you find the net force of an object if the forces are acting in opposite directions? | Subtract the smallest force from the greatest force. |
| What are balanced forces? | When the net force on an object = 0. |
| What happens with an object if the forces on it are balanced? | No acceleration. |
| What are unbalanced forces? | When the net force on an object does NOT = 0. |
| What happens with an object if the forces on it are unbalanced? | Will change the speed of direction (acceleration) of a moving object. |
| As the skydiver falls, the friction (air resistance) becomes equal to the downward pull of gravity. What term is used to describe this? | Terminal Friction. |
| Newton's First Law of Motion is also known as the law of ______________? | Inertia. |
| What does Newton's First Law state? | An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. |
| What does Newton's Second Law state? | The force of an object is equal to its mass times its acceleration. |
| What does Newton's Third Law state? | Whenever an object exerts a force on a second object the second object exert an equal and opposite force on the first object. |
| How does mass relate to inertia? | The more mass an object has, the greater its inertia. |
| What is the Equation for Newton's Second law of motion? | F = MA Force = Mass x Acceleration. |
| What is the equation for momentum? | P = MV Momentum = Mass x Velocity. |
| What is the Law of Conservation of Momentum? | The total momentum is never gained or lost, it stays the same. It is just transferred. |
