The first step in designing or redesigning a product is
a. thinking about ways to solve the problem.
b. deciding what needs you are trying to meet.
c. building a prototype.
d. fully researching the problem.

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Isla’s change in velocity is 30 m/s, and hazel has the same change in velocity. which best explains why they would have different accelerations? isla had negative acceleration, and hazel had positive. isla had a different time than hazel. isla had positive acceleration, and hazel had negative. isla went a farther distance than hazel.