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Science 3/22
| Question | Answer |
|---|---|
| What is the unit for forces? | Newtons |
| How do you use a springscale to measure force? | 1. Zero Out 2. Determine Scale 3. Take Measurement 4. Check with team |
| How do you calculate the net force? | Same Direction: Add together Opposite Directions: Subtract |
| What is meant by a balanced force and an unbalanced Force? | Balanced=0, unbalanced doesn't |
| What effect does a balanced force have on the motion of an object? | If moving, continues to move at a constant velocity If not moving, does not move |
| What effect does an unbalanced force have on the motion of an object? | If moving, slows down, speeds up, or turns If not moving, starts moving |
| Do all objects have gravity or just large objects like planets? | All objects |
| What two factors does the force of gravity depend on? | Distance and Mass |
| What are the two Forms of friction? | Static and Kinetic |
| Wha is static friction? | Stationary |
| What is kinetic friction? | Moving |
| What are the three types of friction? | Sliding- one object slides over another Rolling- one object rolls over another Fluid- On surface moves through a fluid (gas or liquid) |
| How can friction be reduced so you can pull a heavy object with less force? | Change the type of friction |
| What does it mean for an object to be in free fall? | Only force acting is gravity |
| What is the acceleration of an object that is in free fall? | 9.8 m/sec/sec |
| How do you determine the final velocity of an object in free fall? | Vf=Vi+AT |
| How do you determine the distance an object in free fall has traveled? | d= ViT+1/2at^2 |
| What does air resistance do to the motion of an object that is in free fall? | Decrease the acceleration |
| What does an unbalanced force cause? | The object to accelerate |
| What does a balanced force cause? | The object doesn't accelerate |
| What is a force diagram? | Shows all the forces acting an object with arrows where the length of the arrow represents the strength. |
| What is friction? | Force that opposes motion and causes an object to slow down. |
| What is stronger, static or kinetic friction? | Static |
| What is the Law of Universal Gravitation? | The force of gravity acts between all objects in the universe. The larger the masses the greater the force. The closer the masses are the greater the force. |
| What is terminal velocity? | When the downward force of gravity is balanced by the upward force of air resistance, the object stops accelerating and moves at a constant (maximum) speed. Depends on velocity, surface area and mass. |
| What is projectile motion? | The motion of a projectile (a thrown object) is both horizontal and vertical. Two objects (1 dropped vertically, 1 thrown horizontally) will reach the ground at the same time because both are in free fall. |
Created by:
kwaltzer23
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