Answer:
t = 75.4 s
v = 26.9 m/s
Explanation:
Part1 :
v1 = 0 m/s
v2 = 32 m/s
a = 2 m/s2
The time needed to reach the final speed is:
v2 = v1 + a*t
32 = 0 + 2*t
t = 16 s
Part 2:
constant speed of 32 m/s for 53 s
Part 3:
v2 = 32 m/s
v3 = 0 m/s
t = 5 s
The acceleration is negative because the car is stopping:
v3 = v2 + a*t
0 = 32 + a*5
a = - 6.4 m/s
a) The total time the car is in motion is:
total time = 16 + 53 + 6.4 = 75.4 s
b) For the average speed you can calculate the total distance and divide it by the total time for an easier way
Part 1
d = (32+0)/2 * 16 = 256 m
Part 2
d = 32 * 53 = 1696 m
Part 3
d = (32+0)/2 * 5 = 80 m
Average speed:
v = (256 + 1696 + 80)/75.4 = 26.9 m/s
3,89,988 cm/min is the linear velocity
Given,
Diameter of CD = 12 cm
So, Radius of CD = 6 cm
CD is spinning at 10350 rev/min
Firstly , convert rev/min into rad/min
1 rev = 2π radians
10350 rev/min = 10350 × 2π
= 64998 rad/min
Formula used,
where,
is the Linear velocity
is the radius
is the angular velocity
= 6 cm × 64998rad/min
= 3,89,988 cm/min
Thus, linear velocity for any edge point of a 12-cm-diameter CD (compact disc) spinning at 10,350 rev/min is 389988 cm/min.
Learn more about Angular speed here brainly.com/question/540174
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Answer:</h3>
Make-up of Hydrogen
Hydrogen atoms are extremely simple. They are the first atom on the periodic table, this means that they only have 1 proton. The majority of hydrogen atoms don't even have a neutron. As for electrons, hydrogen atoms with no charge have 1 electron. All of this means that for almost all hydrogen atoms the nucleus is made of one singular proton.
Diagram
The diagram shows a hydrogen atom. It looks like one circle because it is just showing the singular proton found in the nucleus. Electrons are extremely small compared to protons, so the electron is not shown in the picture. It is very hard to accurately depict electrons on diagrams like this because of their size and the fact that we can never know where they are. So, the diagram may look too simple but it just depicts how most hydrogen nuclei look.
Answer:
Explanation:
Given
Weight of helicopter
inclination of blades with vertical
Suppose is the lifting Force
Now using F-B-D
as helicopter is moving with constant velocity
balancing forces in Vertical Force
Now sin component of lift is air resistance
where R=air resistance