The work that Sam should do in order to stop is the boat is the same as that of the kinetic energy of the object in order to counter its motion. Kinetic energy is calculated through the equation,
KE = 0.5mv²
where KE is kinetic energy, m is mass, and v is the velocity.
Substituting,
KE = 0.5(1200kg)(1.2 m/s)²
<em>KE = 864 J</em>
Answer: C
Explanation: i hoped that helped!
Answer:
,
, 
Explanation:
The equations of equilibrium for the rock are:


After some algebraic handling, the following expression is found:


Deceleration experimented by the rock is:


The distance travelled by the rock before stopping is:


And the time is:


Answer:
anyone know this or should i get my brother
Answer:
F = 2500N
Explanation:
F = ma
You're given m=25kg and a=100m/s²
Plug it in
F = (25)(100)
F = 2500N