you push a block of 50kg with a force of 400 N over a distance of 8m. How much kinetic energy does the box gain?

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

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same