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S8P3 MOTION REVIEW
Force, Mass, and Motion Notes and Study Guide
| Question | Answer |
|---|---|
| What is velocity? | the speed of something in a given direction |
| What is speed? | Speed is the time rate at which an object is moving along a path |
| Explain displacement. | Displacement is the shortest distance from your initial position to your final position. |
| What is distance? | an amount of space between two things or people. |
| Tell three ways an object can accelerate. | A change in velocity, a change in direction, or a change in both velocity and direction. |
| Explain why deceleration is also acceleration | Deceleration always refers to acceleration in the direction opposite to the direction of the velocity. |
| What does a flat line on a distance/time graph represent? | A straight horizontal line on a speed-time graph means that speed is constant. |
| Greater slope up means ____________ on a distance/time graph. | The steeper the line is, the greater the slope of the line is and the faster the object is moving |
| Greater slope down means ____________ on a distance/time graph. | slowing down at a fast pace |
| What does a flat line on a velocity/time graph represent? | constant speed |
| What does an upward slope on a velocity/time graph represent? | In a velocity-time graph, acceleration is represented by the slope, or steepness, of the graph line. |
| What does a downward slope on a velocity/time graph represent? | , it means that the object is moving in the opposite direction and has nothing to do with acceleration or deceleration. |
| What does constant velocity mean? | Constant velocity means that the object in motion is moving in a straight line at a constant speed. |
| Tell three ways velocity can change. | it can slow down, it can speed up, or it can change direction. |
| If an object’s mass increases, its acceleration will ______________. | decreases |
| Force = _________ x ____________ | mass times acceleration |
| What are unbalanced forces? | forces applied to an object in opposite directions that are not equal in size. |
| What are balanced forces? | forces applied to an object in opposite directions that are equal in size. |
| Net force = _______________ | The net force is the vector sum of all the forces that act upon an object. |
| What type of force does not cause acceleration? | no acceleration occurs when the net force is zero. |
| What is magnitude? | magnitude is described in simple words as 'distance or quantity'. |
| What is vector? | Vector, in physics, a quantity that has both magnitude and direction. |
| Explain Newton’s First Law of Motion. | If a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. |
| Greater mass = __________ inertia | The more inertia that an object has, the more mass that it has. |
| Explain Newton’s Second Law of Motion. | Newton's Second Law of Motion says that acceleration (gaining speed) happens when a force acts on a mass (object) |
| Explain Newton’s Third Law of Motion. | His third law states that for every action (force) in nature there is an equal and opposite reaction |
| What is inertia? | Inertia is the resistance of any physical object to any change in its velocity. |
| what is Inertia | Inertia is the resistance of any physical object to any change in its velocity. |
| What does air resistance depend upon? | The amount of air resistance an object experiences depends on its speed, its cross-sectional area, its shape and the density of the air. |
| What is the formula for velocity? | v = Δs/Δt. |
| What is the difference between speed and velocity? | direction |
| What is the difference between mass and weight? | The mass is essentially "how much stuff" is in an object. ... Weight: There is a gravitational interaction between objects that have mass. |
| How does your mass on Earth compare to your mass on the moon? | The mass of an object on the Moon remains the same as its mass on Earth. |
| How does your weight on Earth compare to your weight on the moon? | its weight gets less because the gravity on the moon is less than on the Earth. |
| Explain friction. How does it affect the movement of an object? | Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. |
| How does the mass of an object affect the amount of force needed to accelerate the object? | As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased. |
Created by:
annahaws
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