true or false

• Rigid bodies


  Extended object with indefinite shape
• Rigid bodies are extended object with indefinite shape- False
• Momentum


  Depends on mass and velocity
• The momentum of an objects depends on its mass and velocity- True
• Interaction of objects produce force-True
• Equilibrant force


  Force with the same magnitude as that of the resultant force
• Equilibrant force is the force with the same magnitude as that of the resultant force- False
• The net work done on a body is equal to the change in its kinetic energy-True
• The value of momentum is the same before and after the interaction of forces-True
• Parallelogram method


  Also called "head-to-tail" method
• Parallelogram method is also called "head-to-tail" method- tail-to-tail (FALSE)
• Trigonometric method


  Part on the graphical method in adding vectors
• Trigonometric method is part on the graphical method in adding vectors.- Polygon method(false)
• Pythagorean theorem was used in applying trigonometric method in adding vectors- True
• Mechanics


  Mathematical description of motion
• Mechanics is the mathematical description of motion- study of motion (false)
• Uniform accelerated motion velocities change in time at a constant rate- true
• Free fall is the state where object falls under the influence of gravity-true
• Galileo stated that objects of the same weight when released at the same time, fell and reach ground at the same time- the different weight(false)
• Free fall


  Two cases: free fall downward and freefall sideward
• There are two cases of free fall the free fall downward and freefall sideward- upward and drop from rest(false)
• The velocity is said to be constant if and only if the acceleration is constant-true
• The velocity of the ball as you thrown upward is increasing due to gravity-decreasing (false)
• If a charged object touches a conductor, some charge will be transferred between the object and the conductor, charging the conductor with the same sign as the charge on the object-true
• Charging by induction is also useful for charging metals and other conductors-true
• The ancient Greeks discovered as early as 600 B.C. that after they rubbed amber with wool, the fur could attract other objects-FALSE
• Two positive charges or two negative charges attract each other-FALSE
• Like charges attract while unlike charges repel-FALSE
• Electrostatic painting employs electrostatic charge to spray paint onto odd-shaped surfaces-true
• Electric field is a vector quantity whose direction is defined as the direction that a positive test charge would be pushed when placed in the field-true
• A charged object creates an electric field - an alteration of the space or field in the region that surrounds it-true
• Neutral objects can be attracted to any charged object-true
• Any substance that has free electrons and allows charge to move relatively freely through it is called a conductor-true
• The conductor is a three-dimensional equipotential region and the surface of a conductor is an equipotential surface-true
• The potential V has the different value everywhere on an equipotential surface-FALSE
• Electric field lines are normal to any equipotential surfaces they intersect-true
• Two conductors that are separated in space will typically be at the same potential-true
• An important application of electric fields and equipotential lines involves the contraction and relaxation of the human heart-true
• When light passes from air into water, its speed increases-FALSE
• In a double-slit experiment, the distance between the fringes increases as the wavelength of light increases-TRUE