Answer: Friction
Explanation:
Friction and the normal force would be the two initial forces to overcome.
The hull type that is best for use on ponds, small lakes and calm rivers is Flat Bottom Hull.
A flat bottomed boat is a boat with a flat bottomed, two-chined hull, which allows it to be used in shallow bodies of water, such as rivers, because it is less likely to ground. The flat hull also makes the boat more stable in calm water.
Covalent should be the answer
Answer: 135 m
Explanation: In order to solve this problem we have to use the kinematic equations given by:
Xf= vo-(a/2)*t^2
Vf=vo-a*t
then we have for the first case:
t=vo/a
15 m= (vo^2/)a- (a/2)*vo^2/a^2= vo^2/2a
then a = (50 km/h*(1000/3600))^2/2*15= 6.43 m/s^2
With this value of the acceleration we solve the set of equation for an initial speed of 150 km/h
xf= vo^2/2a= 150*(1000/3600)^2/(2*6.43)=135 m
