Dhy Q1) An object of mass 2kg falls from the height of 5m and
rebounds to a vertal height of 2m calculate the Change in momentum. If the object is in contact floor for 0.2seconds calculate the force experienced by the object
from the floor.

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air