Question

Fireworks can go up to 1000 feet in around 3 seconds. What is its average vertical speed in feet per second and miles per hour?

Answer 1

Distance Covered, D=1000 feet

Time taken, T=3 seconds

Therefore, Speed in feet per second is, $S=\frac{D}{T}=\frac{1000 feet}{3 seconds}\approx333.33 ft/s$

Now, to calculate the speed in miles per hour all that we have to do is to know the relationship between seconds and hour and feet and mile.

$1 ft = 0.000189394 mile$

$\therfore 333.33 ft = 0.0631306818$ mile

We also know that there are 3600 seconds in 1 hour. Thus,

if in 1 second fireworks go 0.0631306818 mile

then in 3600 seconds (or 1 hour) they go $3600\times 0.0631306818\approx227.27$ miles

Therefore, the speed of the fireworks in miles per hour is:

222.27 miles per hour.

Answer 2

Distance Covered, D=1000 feet

Time taken, T=3 seconds

Therefore, Speed in feet per second is,  S=\frac{D}{T}=\frac{1000 feet}{3 seconds}\approx333.33 ft/s  

Now, to calculate the speed in miles per hour all that we have to do is to know the relationship between seconds and hour and feet and mile.

1 ft = 0.000189394 mile

\therfore 333.33 ft = 0.0631306818  mile

We also know that there are 3600 seconds in 1 hour. Thus,

if in 1 second fireworks go 0.0631306818 mile

then in 3600 seconds (or 1 hour) they go  3600\times 0.0631306818\approx227.27  miles

Therefore, the speed of the fireworks in miles per hour is:

222.27 miles per hour.

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