Answer:
Explanation:
8. Which process(es) of the water cycle—precipitation, evaporation, condensation, runoff, percolation or transpiration-might contribute to the addition of pollutants to rivers, lakes, and oceans? Why? Precipitation and runoff would be the most responsible processes.
Given, m1 = 3.50 g
m2 = 5.5 g
r₁=(3i^ + 3j^)t + 2j^ t²
r₂ =3i^ - 2j^t² - 6j^t
t = 2.50 sec.
Now the position of the center of mass is,
The velocity of the center of mass = (m₁r₁+m₂r₂)/(m₁+m₂)
= {3.5[(3i^ + 3j^)t + 2j^ t²]+5.5[3i^ - 2j^t² - 6j^t]}/(3.5+5.5)
= (-2.89i^-1.39j^)cm
So the velocity of the center of mass = (-2.89i^-1.39j^)cm
What is Velocity?
Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time. Velocity is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of bodies.
What is the Center of mass?
In physics, the center of mass of distribution in space (sometimes referred to as the balance point) is the unique point where the weighted relative position of the distributed mass sums to zero. This is the point at which a force may be applied to cause a linear acceleration without an angular acceleration.
What is the velocity of a particle?
The velocity of a particle is its speed and the direction in which it's moving. It is also described as the instantaneous rate of change of the particle's distance traveled and the direction in which the distance is changing.
To learn more about velocity of particle, refer:
brainly.com/question/80295?source=archive
#SPJ4
The answer for this would be "B".
8 miles per hour
because if it is moving at 4 miles every half hour that means you have to multiply it by two to get it in miles per hour and we all know that 4 times 2 is 8 so it would be 8 miles per hour =)
45N
The normal is perpendicular to the forces that go up or down the slope. The downward force is just the weight .