How many feet of wire does it take to make one Slinky? Each one is made from 80 feet of wire and over a quarter billion Slinkys have been sold worldwide.

You are watching: How many feet of wire in a slinky

Kepler"s third law hypothesizes that for all the small bodies in orbit around the same central body, the ratio of (orbital period squared) / (orbital radius cubed) is the same number. Moon #1: (1.262 days)² / (2.346 x 10^4 km)³Moon #2: (orbital period)² / (9.378 x 10^3 km)³If Kepler knew what he was talking about ... and Newton showed that he go ... then these two fractions are equal, and may be written as a proportion.Cross multiply the proportion:(orbital period)² x (2.346 x 10^4)³ = (1.262 days)² x (9.378 x 10^3)³Divide each side by (2.346 x 10^4)³:(Orbital period)² = (1.262 days)² x (9.378 x 10^3 km)³ / (2.346 x 10^4 km)³ = 0.1017 day²Orbital period = 0.319 Earth day = about 7.6 hours.

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of −5.2

The car strikes the tree with a final speed of 4.165 m/s

The acceleration need to be of -5.19 m/seg2 to avoid collision by 0.5m


First we need to calculate the initial speed



Once we have the initial speed, we can isolate the final speed from following equation:


Then we can calculate the aceleration where the car stops 0.5 m before striking the tree.

To do that, we replace 62 m in the first formula, as follows:


Force = mass x acceleration : __________.a. for any force, there is an equal and opposite reaction force. b. the orbit of each p

a. for any force, there is an equal and opposite reaction force.

See more: Honda Crv Timing Chain Replacement Schedule, When Should The Timing Belt Be Replaced


Newton third law of motion states that " for every action, there is an equal and opposite reaction.

Action force= reaction force =

M₁ * a₁ = M₂ * a₂

where M₁ = mass of object 1

a₁ = acceleration due to object 1

M₂ = mass of object 2

a₂ = corresponding acceleration due to object 2

this happen in everyday life of an individual. an example is seen in a groups of three man exerting a push force on a static car, the push force on the car make the car to exhibit some motion equivalent to the force applied by the three man.