FORCE ICSE CLASS 10 PHYSICS EFFECTS OF FORCE

ICSE PHYSICS CLASS 10 - CHAPTER 1 - FORCE - EFFECTS OF FORCE - Notes

    Effects of Force :

i)        Force can change the state of rest or the state of motion.

a)      Force can move a rigid stationary body which is free to move in the direction of force applied.

b)      A moving body can be stopped by applying a force in the opposite direction of its motion.

c)      The speed of a moving body increases when a force is applied in the direction of its motion.

d)      The direction of a body can be changed by a force applied perpendicular to the direction of the motion.

e)      If a force is applied in any other direction then both the direction and speed of the body will change.

ii)      If a force is applied on a non-rigid body which is not free to move, it changes the shape or size of the body.

    Units of Force:

C.G.S unit        1 dyne = gm cm s^-2

dyne: One dyne is that force which when acts on a body of mass 1gm, produces  an acceleration of 1cm/s² in it.

S.I unit             I newton = kg m s^-2

newton: One newton is that force which when acts on a body of mass 1kg, produces an acceleration of kg/s²_.

1N = 10⁵ dynes

Gravitational unit of force F = mg

M.K.S unit        9.8N = 1kgf

C.G.S unit        980 dynes = 1gf