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:
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Answer:
Sound energy to electric energy - a person talking into a microphone
Radiant energy to electric energy - sunlight falling on solar panels
Gravitational potential energy to motion energy - a ball dropped from a height
Explanation:
A person talking is the sound energy and going into an electric phone
Sunlight or Radiant energy falls onto the solar panels creating electric energy
The ball is being pulled down by gravity from a certain height, going down to the ground, it’s motion, falling
True, physical excercise helps
Evaluate the following numerical expressions.
6 + 3 • 4 =
18
(6 + 3) ÷ (4 – 5) = Answer:
Explanation:
Evaluate the following numerical expressions.
6 + 3 • 4 =
18
(6 + 3) ÷ (4 – 5) =
F equals ma
F/m equals a
a= 3 then