1. What does PE stand for? Physical Education
2. Name one common PE exercise? Your choice A knee push up B piano keys
In projectile motion horizontal motion has zero acceleration and when there is no air resistance acting on the object the motion will be uniform. Motion in the vertical direction is accelerated downwards to to the acceleration due to gravity
Answer:
16.67 rad/s
Explanation:
if you read the question, you would notice that some requirements are missing, while searching online, the complete question can be found here:
https://www.chegg.com/homework-help/questions-and-answers/frictionless-pulley-modeled-080-solid-cylinder-030-m-radius-rope-going--tension-rope-10-n--q3499646
and here is the complete question:
"a frictionless pulley which can be modeled as a 0.80 solid cylinder with a 0.30 m radius has a rope going over it. The tension in the rope is 10 N on the right side and 12 N on the left side. What is the angular acceleration of the pulley?
"
mass (m) = 0.8 kg
radius (r) = 0.3 m
tension on left side (T1) = 10 N
tension on right side (T2) = 12 N
angular acceleration = torque / moment of inertia
where
torque = (12-10) x 0.3 = 0.6 Nm
- moment of inertia = 0.5m
moment of inertia = 0.5 x 0.8 x = 0.036 kg
therefore
angular acceleration = 0.6/0.036 = 16.67 rad/s
Answer:
The mass number will decrease by eight (8).
Explanation:
Given;
successive beta (b), alpha (a), alpha (a) emissions.
Generally, when a radioactive element emits a beta-particle (b), its mass number doesn't increase but its atomic number increases by 1 .
Also when a radioactive element emits an alpha-particle (a), its mass number decreases by 4, while its atomic number decrease by 2.
For the given question, a successive beta (b), alpha (a), and alpha (a) emissions = (0) + (-4) + (-4) = -8
Thus, when a radioactive element emit a successive beta (b), alpha (a), alpha (a) particles, the mass number will decrease by eight (8).
<u>To learn more, please visit:</u> brainly.com/question/23276969
Answer:
The correct option 50.0 m (<u>the units of the answers are wrong, they should be in meters and not in millimeters</u>).
Explanation:
From the first second we can find the acceleration of the object:
Where:
: is the final position = 2.00 m
: is the initial position = 0
: is the initial speed = 0 (starts from rest)
t: is the time = 1 s
The acceleration is:
Now, we can find the distance after 5 seconds:
Therefore, the correct answer is 50.0 m. All the options have the units in millimeters and not in meters hence, the units of the options are wrong.
I hope it helps you!