LC Physics circular motion and simple harmonic motion

a force that tends to oppose motion.

The acceleration of a body in a circular motion. Its direction is towards the centre of the circle

a=rω^2    a=v^2/r

the force on a body in circular motion. Its direction is towards the centre of the circle

• F=mrω^2     F=mv^2/r

Any motion where the acceleration of a particle is proportional to the product of the masses and inversely proportional to the square of the distance between them

a∞-s

the restoring force on a spring is proportional to the extension of the spring.

F=-ks

linear velocity and angular velocity

ω=θ/t

the angle passed through each second

T=2pi/ω

A force that pulls away from the centre of the circle and is known

an axis is equal to the magnitude of the force multiplied by the perpendicular distance from the axis to the line of action of the force

(tells us the ability to make something turn)

moment=f*d

• Use the handle located as far from the hinges as is reasonable.
• For a small force, this creates a large moment or turning effect

e.g crowbar is an example of a lever that makes maximum use of a force to move a heavy object

created by two parallel forces with the same magnitude acting in opposite directions.

• the handlebars of a bike.
• one hand moves forward, the other back, and the couple created turns the handlebar, and with it the bike

1. the sum of the forces in any direction equals the sum of the forces in the opposite direction

2.the sum of the moments equals any point is zero.