A 4000kg truck took 120 seconds to stop. It had an original velocity of 20m/s. How much force was required to stop it

Asmall, positively charged ball is moved close to a large, positively charged ball. which describes how the small ball likely responds when it is released? it will move toward the large ball because like charges repel. it will move toward the large ball because like charges attract. it will move away from the large ball because like charges repel. it will move away from the large ball because like charges attract.

The energy released by a nuclear fusion reaction is produced when

How is the ideal mechanical advantage of a wheel and axle calculated?