Answer:
vf = 0
Explanation:
Since the initial height hi = 0, we can rewrite the energy equation as
vf^2 = vi^2 - 2ghf = (10 m/s)^2 - 2(10 m/s^2)(5 m) = 0
Therefore, his final velocity vf is
vf = 0
There are 120 seconds in two minutes, so to find the answer, you multiply 20 x 120 to get 2400 meters.
When pushing the body it is necessary to break the frictional force generated by the floor. Once this frictional force is overcome, the body will begin to move. Ideally, if a constant velocity is maintained or close to this value, the acceleration that will be exerted will tend to be zero and therefore, by Newton's second law the value of the Force will also tend to minimum values.
Remember that this law tells us that


Therefore the best strategy is A. keep pushing the box forward at a steady speed
Answer with Explanation:
We are given that
Mass of one cart,
Mass of second cart,
Initial velocity of one cart,
Initial velocity of second cart,
a.Total momentum,

b.Velocity of second cart,
=0
According to law of conservation of momentum
Initial momentum=Final momentum


