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# S8P3 MOTION REVIEW

### Force, Mass, and Motion Notes and Study Guide

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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