Abox of mass 45 kg slides down a ramp onto a flat surface. the box slides a distance of 4.9 m across the flat surface and then stops. the coefficient of friction between the flat surface and the box is 0.39. what was the speed of the box at the base of the ramp?

6.1 m/s

0.77 m/s

3.0 m/s

19 m/s

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader