# Homework Help: Grade 11 phyics problem 4

1. Dec 10, 2006

### Iceclover

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

A crane lifts a 2.25x10^3 bucket containing 1.15m^3 of soil (density = 2.00x10^3kg/m^3) to a height of 7.50 m. Calculate the work the crane performs.

2. Relevant equations
D=m/V
W=Fd

3. The attempt at a solution

F=2n25x10^3N
d=7.50m
D=2.00x10^3 kg/m^3
V=1.15m^3
W=?

alright so i've calculated the mass the object will have and i got 2.3 x 10^3kg
Now i was just wondering if anyone could help me on where to go from here?

2. Dec 10, 2006

### billiards

find the weight of the soil, add it on to the weight of the bucket and use your W=Fd equation.

3. Dec 10, 2006

### Iceclover

how do i find the weight of the soil and the weight of the bucket?

4. Dec 10, 2006

### billiards

weight=mass*g

g=acceleration due to gravity=9.81

you already know the weight of the bucket is 2.25*103 N.

5. Dec 10, 2006

### turdferguson

Is it N or kg? You didnt specify and its very important

6. Dec 10, 2006

### Iceclover

is what in N or kg? everything is there