At one instant, an object is moving straight up at 80 meters per second. Four seconds later, its speed should be about
O 100 m/s.
O 50 m/s.
O 90 m/s.
O 60 m/s.
O 40 m/s.

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

Every winter i fly home to chicago. it takes 3 hours. what is my average speed?

Which statements describe how a machine can make work easier? check all that apply. it can put out more force than the input force by decreasing the distance through which force is applied. it can increase the amount of work performed if the output force is in the same direction as the input force. it can apply a force to an object in a different direction than the force applied to the machine. it can increase the distance through which a force acts by exerting less force than was used on it. it can exert a greater force through a greater distance than the force used on the machine.