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• ### list three ways in which a person can increase the torque that they apply to a system

increase/lengthen lever arm
increase force
apply force perpendicular to lever arm

### when does a system topple

when the center of gravity of an object is below the area of support

women

children

men

### what causes a rotating system to wobble

if its center of gravity is not in line with its axis of symmetry

### torque

a force that causes rotation

### if tcw=fd an tccw=fd, then...

the torques are balanced

### how can you increase the lever arm of a screwdriver

putting a wrench on the lever arm.

### ccw

acronym for counter clockwise

### toppling

occurs when cg is not above support base

### negative

buoyancy that causes an object to sink through a medium

### balanced

when cw and ccw torques are equal and no rotation occurs

### leverage

the use of a long lever arm to increase torque

### positive

buoyancy that causes an object to rise through a medium

### torque

the product of force and lever arm measured in newton-meters

### stable

an object that raises its cg with any displacement

### plumb bob

a weighted object tied to a string and used to determine a vertical line

### children

humans with highest cgs

### neutral

an object that neither raises nor lowers its CG with any displacement

### unstable

an object that lowers its CG with any displacement

### cw

acronym for clockwise

### distance

lever arm from axis of rotation to location where force is applied

### wobbling

motion that results when CG is not located at the axis or rotation

### neutral

buoyancy that causes an object to remain suspending in the medium that they displace

### women

humans with he lowest CGs

### equilibrium

when no rotation occurs because sigma torque = 0Nm

### CG

acronym for center of gravity. the point where weight is measured from

t=Fd

### how can force be maximized

>force
>distance
apply perpendicular force

### what happens when torques balance a) tcw=tccw b) sigma t = 0N c) no rotation d) all of these e) none of these

d) all of these

inverse

stable

tcw

toppling

### which child must sit closer to the fulcrum of a teeter totter in order to balance torques

the heavy one

@CG

### which factor makes a building stable a) wide support base b) low CG c) both d)none

c) both of these

### which end of the baseball bat has the greater mass when it balances horizontally on its fulcrum

the short barrel

### what does a wobbling star indicate to astronomers a) planets b) cg away from axis c) both of these d) none of these

c) both of these

it rises

wobbling

### when a high jumper clears the bar, where does her CG go

under the bar

the bat's CG

rotation

children

### what happens to the CG of a system in unstable equilibrium as it topples

it moves down

lever arm

Example: