Plz help asap i have a lot left and this is almost due Did there appear to be a difference between the work done to lift the objects versus sliding them across the table? Which took more work? Why do think this was the case?

Which would take more work: lifting a 4 N box 0.5 m or a 1 N box 4 m? Explain your answer.

Sheleah does 1500 J worth of work on a 250 N box. How far does she have to move the box?

A 400 kg box and a 200 kg are to pushed across a horizontal table, the exact same distance with the exact force. Which box will have the most work done on it? Which box will get to the end first? Explain both of your responses.

Which quantities are scalars? choose all that apply a. distance b. speed c. acceleration d. velocity

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

4. who was the first one to measure the speed of light and conclude that it is finite? 5. who was the first philosopher who thought the speed of light is finite? 13. what is the speed of light numerically? 14. give an example of something moving faster than light 15. give an example for some particles or waves that