Question

Solve the followingI Jou 16 000,000-1. Convert 450J into Btu, ev, erg, cal and k-1bs. 45 0-025900 HSOJ6242416450JDOO0.426 SBtu 10r.cesTOSS Joule2396 59 480 e pare teV9 2. A tractor exerts a constant force of 5.0*10-N in a chain while pulling å5218092245030cm. What is the work done by the tractor?3. Suppose you pushed a lawnmower around a rectangle that is identical to theImperial Palace in Bejing China, the world's largest with a constant force of60.0N. If you did 2.05*10-J of work, how far did you push the lawnmower. If theImperial Palace is 9.6*10²m long, how wide is it?

Answer 1

(2)

Given data

*The given constant force is F = 5.0 × 10^3 N

*The given displacement is s = 30 cm = 0.30 m

The formula for the work done by the tractor is given as

`W=F\mathrm{}s`

Substitute the known values in the above expression as

`\begin{gathered} W=(5.0*10^3)(0.30) \\ =1.5*10^3\text{ J} \end{gathered}`

Hence, the work done by the tractor is W = 1.5 × 10^3 J