A forklift was used to lift a 750 kg. oil drum 18 m straight up into the air to store on a shelf. If it does it in 28 seconds, Calculate the work and power exerted by the forklift. W= J

P= watts

Explanation:

Given parameters:

Mass of forklift  = 750kg

Height of lift  = 18m

Time taken  = 28s

Unknown:

Work done = ?

Power = ?

Solution;

 The work done by the forklift is given as:

  Work done = mass x acceleration due to gravity x height

   Work done  = 750 x 9.8 x 18  = 132300J

Power is the rate at which work is done;

      Power  =  

 Insert the parameters and solve;

    Power  =  = 4725W

d) the number of neutrons plus the number of protons

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2