physics rev 2 - pt 1

Question 1

• Equal to the product of the magnitude of the force exerted on the object and the displacement that the object moves when the force is being applied.

Answer 1

WORK

Question 2

• Ability/capacity to do work.
• SI units: Joules

Answer 2

ENERGY

Question 3

• Energy of motion
• Gk. Word “kinetikos” or motion.
• E.g. work exerted by a flying cannonball as it hits a
  brick wall
• scalar quantity

Answer 3

KINETIC ENERGY

Question 4

• States that “the net work done on an object is equal to the change in the object’s kinetic energy”.

Answer 4

WORK-ENERGY PRINCIPLE

Question 5

• Energy stored or energy in position.
• E.g. divers on diving boards; KE is present when they
  dive.

Answer 5

POTENTIAL ENERGY

Question 6

o “Work required of an external force to move the object without acceleration between the two points”

Answer 6

Change in POTENTIAL ENERGY

Question 7

• Spring has PE when compressed as it can do work when it is released

Answer 7

POTENTIAL ENERGY OF ELASTIC SPRING

Question 8

o “Presents the relationship between the force applied to an unstretched spring and the amount the spring is stretched”

Answer 8

Hooke’s Law

Question 9

Forces that depend on the path taken by an object

Answer 9

NON-CONSERVATIVE FORCES

Question 9

Forces for which the work done do not depend on the path taken but rather depend only on the
initial and final positions

Answer 9

CONSERVATIVE FORCES

Question 10

• “Energy is neither created nor destroyed”
• It just changes it form but it does not disappear
• There is just a conversion of energy from a state to
  another.

Answer 10

LAWS OF CONSERVATION OF ENERGY

Question 11

• Product of its mass and its velocity.
• Represented by the symbol p
• A vector quantity (direction of velocity and momentum
  are the same)

Answer 11

LINEAR MOMENTUM AKA MOMENTUM

Question 12

objects cling with each other after collision then move with a common velocity.

Answer 12

Perfectly Inelastic

Question 12

TYPES OF COLLISIONS (3)

Answer 12

elastic

inelastic

perfectly inelastic

Question 12

• _____ required to change the momentum of an object

Answer 12

Force

Question 13

o States that “the total amount of momentum is the same before and after the collision of two objects”

Answer 13

Conservation of Momentum

Question 14

Objects separate after collision.

Answer 14

elastic

Question 14

• “change in momentum”
• SI Unit: N*s

Answer 14

impulse

Question 15

Objects separate after collision

Answer 15

inelastic

Question 15

o States that impulse of an object is equal to the
change of momentum

Answer 15

Impulse-Momentum Theory