PHysical properties are properties that do not involve changes in the molecular level. In this case, malleability and magnetism are physical.
Chemical properties involve changes to the substance at the molecular level or change its identity. In this case, reacting with oxygen and nonflammability is a chemical property.
Answer: 
Explanation:
Given
Inclination of hill 
Each revolution moves 6 m along its path
Diameter of the circle 
the total mass of the cyclist and his bike 
Suppose a single pedal cyclist gain a vertical height of 

Average force cause to gain in Potential energy

Thus, the average force is 
Answer: distance
Explanation:
Speed equals distance over time
Meaning time is on y axis and distance is on x axis
Time will always, Always be on y axis
So in any formula time will be on y axis and your other unit will be on x axis in this case s=d/t d being distance