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Module 2 Test
Freshman Year Semester 2 Module 2 Test
| Question | Answer |
|---|---|
| What is the definition of motion? | A change in an object's position relative to a reference point |
| What is a reference point? | Something that is stationary that you compare movement to |
| How does it affect what is in motion? | We use it to decide if an object's in motion |
| What is the most common reference point in physics? | The Earth and things attached to it |
| What is displacement? | Distance and direction an object moves compared to a reference point |
| Is displacement a vector quality? | Yes |
| How do you correctly combine displacements? | Same direction- add directions together Opposite direction- take the first distance and subtract the second |
| What is the definition for speed? | Rate an object moves |
| What is the equation for speed? | Speed=distance/time |
| What is a vector? | Including direction and magnitude (size) |
| How does average and instantaneous speed differ? | Average- your overall average speed Instantaneous- your speed at a given time |
| What is constant speed? | Speed that stays the same |
| What does a graph of constant speed look like? | A diagonal straight line |
| What is velocity? | Speed and direction (in a straight line) |
| How do speed and velocity differ? | Speed doesn't have a direction, but velocity needs speed and direction |
| Is velocity a vector quality? | Velocity is a vector quality |
| Is it possible for two objects to have the same speed but different velocities? | Yes, they could have the same speed but be going in different directions |
| How do you combine velocities? | Same direction- add Opposite direction- subtract |
| What is the definition of acceleration? | The rate of change in velocity |
| What is the equation for acceleration? | a= Vf-Vi/t |
| What is negative acceleration called? | Deceleration |
| Why is an object in circular motion accelerating even though its speed may be constant? | You are constantly changing direction when you are moving in a circle, so it is accelerating because the direction in velocity is changing |
| What is acceleration toward the center of a curved or circular path called? | Centripetal |
| What is projectile motion? | A projectile is anything that is thrown or shot through the air |
| What causes projectiles to follow a curved path? | Gravity |
| What is momentum? | Quantity of motion |
| What is the equation for momentum? | p=mass times velocity |
| What is momentum's units? | Kg x m/s |
| Is momentum a vector quality? | Yes |
| What does the Law of Conservation of Momentum state? | Momentum cannot be created nor destroyed, only transferred from one object to another |
| What is the formula for vertical velocity? | Vv=gt |
| What is the numerical value for the constant designating acceleration due to gravity? | 9.8 m/s/s |
| What is vertical velocity's units? | meters/second |
| Is the acceleration of gravity the same for all masses? | Yes |
| Why do objects not fall at the same rate? | Air resistance stops objects from falling at the same rate based on the shape of the object |
| What force causes the air resistance phenomenon? | Friction |
| What is terminal velocity? | The fastest an object can fall (fastest possible velocity) |
Created by:
Mrs. Wiles Lover
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