URGENT HELP PLS For a variable force acting on an object from
Position 1 to Position 2, the work done can
be approximated by W = EF, Ax. How can
the approximation be improved?

1. By making Ax smaller
2. By making Ax bigger
3. By making F, constant

Describe uniform velocity and variable velocity in short

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.

The ability to make things happen is also called a. heat b. force c. matter d. energy