Tiêu đề PHYSICS PART- 2.pdf ✅

PHYSICS Class - C5 (Part - II) Let A = 1 B = 2 C = 3 and so on .... Then KNOWLEDCE = 11 + 14 + 15 + 23 + 12 + 5 + 4 + 7 + 5 = 96 HARDWORK = 8 + 1 + 18 + 4 + 23 + 15 + 18 + 11 = 98 ATIITUD = 1 + 20 + 20 + 9 + 20 + 21 + 4 + 5 = 100 That means KNOWLEDCE gives you only 96% success. HARD WORK gives you only 98% success. But "ATTITUDE" alone gives you 100% success. INDEX Chapter No. Name of the Chapter Page No. 5. Newton's Laws of Motion 05 − 37 6. Forms of Energy 38 − 54 7. Electricity 55 − 73 8. Optics 74 − 95 9. Magnetism 96 − 118
INDEX S.No. Concept Topic Page. No. 1. Wise Up 7 − 8 2. I Newton's First Law, types of inertia 09 − 12 3. II Momentum 13 − 15 4. III Newton's Second Law 16 − 20 5. IV Newton's Third Law 20 − 23 6. V Free body diagram 24 − 32 7. Quick Review 32 − 36
8. Analyse and Assess 37 5 NEWTON'S LAWS OF MOTIONWISE UP FORCE : 'Force' generally denotes a push or a pull. A force may be defined as an external cause which changes or tends to change the state of rest or uniform motion of body in a straight line. TYPES OF FORCES - Gravitational force : The force that acts between massive objects is known as gravitational force. Note: The force exerted by earth on objects present on earth is treated as weight of the object. - Normal force: The force that acts perpendicular to the contact surface between the objects is known as normal force. - Frictional Force: The force that acts parallel to the contact surface between the objects is known as frictional force. - Tension: The force exerted by the string on the object connected to it is known as tension. - Spring Force: The force exerted by the spring is known as spring force. UNITS OF FORCE SI unit of force is newton (N) CGS unit of force is dyne gravitational units of force are kgf or kgwt. and gf or gwt.
1 N = 105 dyne 1dyne = 10−5 N 1kgf = 1kgwt = 9.8 N 1gf = 1gwt = 980 dyne NEWTON'S FIRST LAW : Every body continues to be in its state of rest or in uniform motion along a straight line unless it is acted only by an external force to change its state. Newton's first law of motion explains the concept of force qualitatively. If a net force acts on a particle it accelerates. LINEAR MOMENTUM : The linear momentum of a particle is the product of its mass and velocity. P⃗ = mV⃗ Linear momentum is a vector, it points in the direction of the velocity of the particle. NEWTON"S SECOND LAW: According to Newton II law of motion, the rate of change of linear momentum of a particle is equal to the net force on the particle. F = ma IMPULSE : Force acting for a short duration and which vary with time are impulsive forces. Ex :