What property of a grocery cart determines how much effort is needed to move it ?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Astudent pushes a 40-n block across the floor for a distance of 10 m. how much work was applied to move the block? a. 4 j b. 40 j c. 400 j d. 4000 j