Answer:
18 m/s
Explanation:
15 m/s + 3 m/s = 18 m/s
<span> The quantity that is determined by the distance moved and the force used is called work.
To determine the amount of work being done you would simply multiply the distance moved and the amount of force used.
HOPE THIS HELPS! ^_^</span>
Answer:
The average power the student expended to overcome gravity is 560W, Watts is a units of work it is Joules /time or kg*
/ 
Explanation:
Weight = 700N

The power is the work in (Joules) or (N*m) in a determinate time (s) to get Watts (W) units for work

Answer:
Fundamental unit is any unit that is not dependent on other units and other units can be derived from them
Explanation:
Units such as Kilogram, Mass and Time are said to be fundamental units because they are independent.
Differences between Mass and weight;
1. Mass is the measure of the amount of matter in a body while weight is a measure of how the force of gravity acts upon that mass.
2. Mass is a scalar quantity while weight is a vector quantity