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Physics Formula List FORCE F=ma , F=mg Linear momentum ( P )=m v p= (mv) EQUATIONS OF MOTION: (i) 1 2 (ii) S=ut + a t 2 V =u+ at (iii) v 2 u 2=2 aS Where uinitial u initial velocity , v final velocity , S displacement ,t time , a acceleration Moment of force (torque /turning effect)=force Perpendicular distance Moment of couple=Either force perpendicular distance b /w 2 forces Principle of moments : of clockwise moment= of anticlockwise moment ieW 1 l 1=W 2 l 2 WORK , ENERGY POWER Workdone=force displacement ie W =F S Workdone=force component of displacement the direction of force (Work done by the force of gravity) W =mgh Power= ieW =F S cos work done time ie P= W t Power=force average velocity ie P=F v 1 2 Kinetic energy= mass velocity 2 potential energy( P . E)=mgh 1 2 ie K . E= mv 2 Gravitational potential energy(U )=mgh Relation between kinetic and potential energy: P= 2 mk K= p2 W=K f K i V = 2 gh 2m h= u2 2g u u 2u t a ( time of ascent )= , t d ( time of descent )= , time of flight= g g g
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