(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

How much work is required to lift a 4.0 kg concreted block to a height of 2.0 m?

mass = 4.0 kg

distance = 2.0 m

2. Relevant equations

W = Fd

F = mg (not sure if this is used)

3. The attempt at a solution

To find Force, I used the formula F(orce) = m(***) times g(ravity) which would be F=(4.0kg)(9.8m/s^{2}), giving me F=39.2N

Now, I used this information in the W = Fd equation, giving me W = (39.2N)(2.0m) = 78.4 J

The reason I am unsure if this is correct is that an example is given with a very similar problem:

m=5.0kg

d=0.45m (above the counter)

The answer given is 3.22 J. Using the formulas I used, I come up with 22.05 J.

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Finding Work given mass and distance

**Physics Forums | Science Articles, Homework Help, Discussion**