Answer:
a. Momentum A = 280 Kgm/s.
b. Momentum B = 595 Kgm/s.
c. Total momentum = 875 Kgm/s.
Explanation:
Let the two people be A and B respectively.
<u>Given the following data;</u>
Mass A = 70kg
Mass B = 85kg
Velocity A = 4m/s
Velocity B = 7m/s
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
a. To find the momentum of A;
<em>Momentum A = 280 Kgm/s. </em>
b. To find the momentum of B;
<em>Momentum B = 595 Kgm/s.</em>
c. To find the total momentum of the two persons;
Substituting into the equation, we have;
<em>Total momentum = 875 Kgm/s</em>.
A microscope is used for the purpose of magnification of an object which is usually very minute - so much so that it is not easy to be seen with the naked eye. If a mount slide contains the word <em>lens</em> which is easily readable with the naked eye and if this slide is kept under a microscope, the text will appear:
- From left to right that is in the same original direction as it was positioned on the slide.
- Highly magnified which may make it illegible to be read using the microscope.
Answer:
0.19 rev
Explanation:
We can solve the problem by using the law of conservation of angular momentum. In fact, if we assume there are no external torques acting on the diver, the angular momentum must be conserved:
where
L is the angular momentum
I is the moment of inertia
is the angular velocity
- When the diver is tucked,
is her moment of inertia
She makes 2 revolutions (so, ) in t = 1.0 s, so her angular velocity is
So her angular momentum is
- When the diver is not tucked,
The angular momentum is conserved, so
the moment of inertia is
So the angular velocity is
So in a time of t = 1.5 s, the angular displacement is
Converting into revolutions,
The answer is 330 meters per second! hope this helped! please crown me if it did when you can!
Answer:
Look below
Explanation:
Units are very important. Let's say we were building an apartment. We used meters for every measurement except for 1 support where we used centimeters. This could lead to the collapse of the whole structure as the measurements were wrong. 100 meters and 100 centimeters are very different.