2. EFFECTS OF COMPUTER SIMULATION ON PERFORMANCE AND RETENTION OF SECONDARY SCHOOL PHYSICS STUDENTS IN MINNA NIGER STATE BY POPOOLA OLABODE 2009/1/34123BE DEPARTMENT OF SCIENCE EDUCATION, SCHOOL OF TECHNOLGY EDUCATION FEDERAL UIVERSITY OF TECHNOLOGY MINNA NIGER STATE, NIGERIA.

3.  LINEAR MOMENTUM  NEWTON’S FIRST LAW OF MOTION  NEWTON’S SECOND LAW OF MOTION  NEWTON’S THIRD LAW OF MOTION

4. P= m v where p- momentum, m-mass and v-velocity. Thus a body of mass 2kg moving with velocity of 10m/s has the same momentum as a body of mass 5kg moving with velocity of 4m/s. V-10m/s p= v-4m/s p=

5. It is common experience that a body at rest will remain at rest e.g., A book at rest on top of a table will remain there unless something pushes it or pulls at it. From these law we obtain the idea of inertial. Inertial is the tendency of a body to preserve its state of rest or in uniformly motion.

6. F ᾳ change in momentum time taken for the change F ᾳ mv – m u t F ᾳ m( v-u ) where v-u = acceleration t t thus F = Kma where constant k = 1 F = ma unit of force is Newton

7. F = ma f=10 f=20 20kg

8. The law implies that when a body A exert a force F(A) on a body B, the body B always exert a force F(B) on a body A. The force F(A) and F(B) are equal in magnitude but opposite in direction AB

9. 1. An unbalance force of 20N act on a 4.0kg mass. What acceleration does it give it SOLUTION F = Ma 20N = 4a a = 5m/s 2. A body of mass 3.0kg move with a velocity 10m/s. calculate the momentum of the body SOLUTION p= M × v P=3×10 P=30kgm/s

10.  momentum(p) of a body is define as the product of mass(m) and velocity(V). It unit is kgm/s  Newton’s first law : State that every object continue in its state of rest or uniformly motion unless is acted upon by an external force  Newton’s second law : State that the rate of change of momentum is proportional to the impressed force and it take place in the direction of the force  Newton’s third law : State that to every Action there is an equal and opposite Reaction

11. 1. The rate of change of momentum is directly proportional to impressed force is (a) Newton’s law of motion (b) Newton’s second law of motion (c) Newton’s third law of motion (d) Newton’s last law of motion 2. The following is the formula for calculating the Newton’s second law of motion except (a) f = mv- mu (b) f = fm - fu (c) mu = p/t (d) p = mv 3. Every objects continue in its state of uniform motion on a straight line unless acted upon by external force is called (a) Newton’s law of motion (b) Newton’s second law of motion (c) Newton’s last law of motion (d) Newton’s third law of motion 4. The products of mass and velocity is referred to as (a) Momentum (b) inertia (c) force (d) work 5. If a force of 6.0 N acts on a body for 5s what is the change of momentum (a) 25Kg -1 (b) 30Kg -1 (c) 35Kg -1 (d) 40Kg -1

12. 1.b 2.d 3.a 4.a 5.b