SCIENCE

• Kinetic energy is associated with an object in motion.
• Changing velocity, accelerating (or decelerating), force is being applied when an object whose mass stays constant but its momentum is changing.
• · A person can be stop when he/she has more mass, more momentum, and has less stoping distance.
• · When two objects collide and move together, as one mass after collision it is called perfectly inelastic.
• · When two objects although moving in the same speed, the one having the greater mass will have more momentum.
• Law of inertia


  Also known as Newton's first law of motion, an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force
• Object at rest or in uniform motion


  • Your body and a heavy physics book when teetering on the edge of a cliff or tall building
• Law of inertia


  Also known as Newton's first law of motion, an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force
• When you have an object at rest or in uniform motion

  It resists any changes in its state of motion
• Object at rest or in uniform motion


  • Your body and a heavy physics book when teetering on the edge of a cliff or tall building
• If you were to fall off the cliff or building

  Your body and the physics book would continue moving in the same direction and at the same speed unless acted upon by an external force (such as the ground or another object stopping your fall)
• When you have an object at rest or in uniform motion

  It resists any changes in its state of motion
• Understanding the law of inertia might prompt you to take appropriate action to prevent or minimize the consequences of a fall
• If you were to fall off the cliff or building

  Your body and the physics book would continue moving in the same direction and at the same speed unless acted upon by an external force (such as the ground or another object stopping your fall)
• Understanding the law of inertia might prompt you to take appropriate action to prevent or minimize the consequences of a fall
• While individual objects may change their velocity during a collision, the overall or total velocity of the colliding objects is conserved.
• · Impulse is a vector quantity.
• · Momentum:  The momentum of an object varies directly with the speed of the object; An object which is moving at a constant speed has momentum; Momentum is a vector quantity.
• · There is a change in velocity when the object moves around a curve, changing paths, and moving then suddenly stops.
• · You can ignore air resistance when an object falling toward the surface of the earth has a velocity that is constant.
• · Both will hit the ground at the same distance when two objects run in different velocity, the horizontal component of their velocities (assuming no air resistance) remains constant. This means that both will travel the same horizontal distance during their fall, regardless of their initial vertical velocities.
• · Both will hit the ground at the same distance when two objects run in different velocity, the horizontal component of their velocities (assuming no air resistance) remains constant. This means that both will travel the same horizontal distance during their fall, regardless of their initial vertical velocities.
• · The Law of Conservation of Energy states: Energy cannot be created or destroyed, it can only be transformed
• A moving object will eventually come to a stop due to friction because all of
• · If two bowling balls were to collide head on, and bounce off one another, the collision would be considered an Elastic collision.
• · A projectile’s velocity changes because of gravity, and its velocity remains constant.
• If KE is increasing, PE will decrease, and vice versa.
• · In gaining more gravitational potential energy remember that Gravitational potential energy is directly proportional to an object's mass, the acceleration due to gravity, and the height above a reference point.
• · The principle of conservation of energy states that the total energy in a system is constant, the total energy gained by the system is equal to the total energy lost, and the total initial energy in a system is equal to its total final energy.