The go kart driver does 1234J of work when hitting a barrier. Assuming the barrier moved 100 meters from its original location, what was the force at which the driver hit the barrier?

Gunpowder residue is most likely to show up where on a shooters hands

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

The california mussel (mytilus californianus) attaches itself to a rock or other solid surface with a bundle of filaments known as the byssus. imagine that 15.0 j of work is done to stretch the distal end of the byssus. it releases 10.8 j of thermal energy as it relaxes. what is the resilience of the distal end of the byssus?