A motor does 20 joules of work on a block, accelerating the block from rest vertically upward. Neglecting friction, if the gravitational potential energy of the block increases by 15 joules, how much kinetic energy does the block have?

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

An electric current is flowing through the cord below. what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.