Answer:
Potential energy
Explanation:
Potential energy is stored energy and the energy of position––gravitational energy. There are several forms of potential energy. Electrical Energy is the movement of electrical charges. Everything is made of tiny particles called atoms.
- Scientific Forms of Energy_ Stored Energy, Kinetic Energy ...ei.lehigh.edu › learners › energy › readings › energy_basics
Answer:
9.9 s
Explanation:
mass (m) = 1000 kg
initial speed (u) = 90 km/h
final speed (v) = 45 km/h
relationship between the speed (v) of the boat and the frictional force (fk) ⇒ fk = 70v
- the acceleration of the system will be given by (a) =
- acceleration is also the first differential of velocity with respect to time,
a =
- therefore acceleration (a) = =
- recall that fk = 70v
(a) = = =
(a) = =
- integrating both side of the equatin we have
t =
- the time required for the boat to slow down = t = = - 9.9 s = 9.9 s