click below
click below
Normal Size Small Size show me how
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. |