| Term | Definition |
|---|
| they add together | What happens when 2 forces act in the same direction? |
| weight | The force of gravity on a person or object is called? |
| friction | The force that one surface exerts on another when 2 rub against each other is |
| bike tires on the road as you ride | Which one of the following examples of rolling friction |
| free fall | when the only force acting on an object is gravity the object is said to be? |
| friction | Air resistance is a type of? |
| attraction to each other | The law of universal gravitation states that if any 2 objects in the universe, without exeption |
| force | In physical science, a push or pull is? |
| mass | The amount of matter in an object is? |
| gravity | the force that pulls falling objects toward Earth is? |
| air resistence | Objects falling through air experience a type of friction called? |
| Newton | The SI unit of of force is the? |
| balanced | _______ forces don't change an objects motion |
| never | Balanced forces acting on an object _____ changes an objects motion |
| hard | Friction depends on the types of surfaces involved and how _____ the surfaces push together |
| distance | Mass and _______ affect the gravitational attraction |
| net | The overall force on an object after all the forces are addeed together is called ___ force |
| motion | Unbalanced forces acting on an object produce a change in an objects? |
| fluid | Wet pavement is more slippery than dry pavement because the force needed to overcome _____ friction is less than the force to overcome sliding friction |
| newton | The metric unit that id most often used to describe weight is the? |
| gravity | The force of gravity between you and Earth is greater thanthe force of grabity between you and the car because Earth has more ____ than the car |
| opposite | Force that acts in a direction ________ to an objects direction of motion |
| inertia | The tendency of an object to resist change in its motion is known as? |
| inertia | The greater the mass the greater its |
| decrease | One way to increase acceleration is to ________ mass |
| inertia | The property in matter that resists a change in motion is called? |
| acceleration | According to Newtons 2nd law of motion, _________ depends on an objects mass, and the net force acting on the object |
| mass | A measure of an objects ___ is a measure of an objects inertia |
| inertia | a person traveling in a car that stops suddenly keeps moving forward do to? |
| momentum | The product of an objects mass and velocity is called its? |
| momentum is not lost | According to the law of conservation of momentum, when 2 obects collide in absence of friction |
| 3rd | The acheivement of lifting a rocket off the ground and into space can be explained by Newtons ___ law |
| By increasing its mass | How can you increase the momentum of an object? |
| exerts an eqaul force back on hammer | According to Newtons 3rd law of motion , when a hammer hits a nail, the nail _______________________________________ |
| reaction | Newtons 3rd law of motion states that for every action there is an equal and opposite? |
| kg x m/s | A unit of momentum is |
| equal | According to Newtons 3rd law of motion the strength of a reaction force is _______ to the strength of a reaction force |
| direction | the momentum of an object is in the same _________ as its velocity |
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