Answer: (2) Use the Momentum Principle.
Explanation:
In fact, it is called the <u>Conservation of linear momentum principle,</u> which establishes the initial momentum
of the asteroids before the collision must be equal to the final momentum
after the collision, no matter if the collision was elastic or inelastic (in which the kinetic energy is not conserved).
In this sense, the linear momentum
of a body is defined as:

Where
is the mass and
the velocity.
Therefore, the useful approach in this situation is<u> option (2)</u>.
Answer:
The angle is 65.6°.
Explanation:
Given that,
Speed = 2.20 m/s
Distance from the shore= 500 m
Distance from the bottom= 1100 m
Speed of boat = 7.30 m/s
According to figure,
We need to calculate the angle with shore
Using formula of angle

Put the value into the formula



We need to calculate the angle

Put the value into the formula


Hence, The angle is 65.6°.
Answer: 1.77 m/s²
Explanation: acceleration is expressed in:
a= ∆v / t = vf-vi/t
a= 18.8 m/s - 0 / 10.6 s
a= 1.77 m/s²
The force must be made over a distance