Adart gun suspended by strings hangs in equilibrium. the mass of the gun is 355 grams, not including a dart. the gun fires a 57.0 gram dart, causing it to swing backwards. the gun swings up to a height of 18.3 centimeters. what was the dart's speed in meters per second just after firing?

dart's speed is 11.77 m/s

Explanation:

given data

mass of the gun m = 355 gram = 0.355 kg

height = 18.3 centimeters = 0.183 m

dart = 57.0 gram = 0.057 kg

to find out

dart's speed

solution

we apply here law of conservation of energy that is express as

mgh = 0.5 × m × v²      ...........1

so speed of gun will be here as

V =     ..................2

V =

V =  1.89 m/s

and

now we find speed of dart by use law of conservation of momentum that is

M×V  = m×v         ...............3

so speed of the dart is

v =

v =  

v = 11.77 m/s

so dart's speed is 11.77 m/s

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate