Answer:
(A) 0.54 kg.m^{2}
(B) 0.0156 N
Explanation:
from the question you would notice that there are some missing details, using search engines you can find similar questions online here 'https://www.chegg.com/homework-help/questions-and-answers/small-ball-mass-120-kg-mounted-one-end-rod-0860-m-long-negligible-mass-system-rotates-hori-q7245149'
here is the complete question:
A small ball with mass 1.20 kg is mounted on one end of a rod 0.860 m long and of negligible mass. The system rotates in a horizontal circle about the other end of the rod at 5100 rev/min. (a) Calculate the rotational inertia of the system about the axis of rotation. (b) There is an air drag of 2.60 x 10^{-2} N on the ball, directed opposite its motion. What torque must be applied to the system to keep it rotating at constant speed?.
solution
mass of the ball (m) = 1.5 kg
length of the rod (L) = 0.6 m
angular velocity (ω) = 4900 rpm
air drag (F) = 2.60 x 10^{-2} N = 0.026 N
(take note that values from the original question are used, with the exception of the air drag which was not in the original question)
(A) because the rod is mass less, the rotational inertia of the system is the rotational inertia of the rod about the other end, hence rotational inertia = where m = mass of ball and L = length of rod
= = 0.54 kg.m^{2}
(B) The torque that must be applied to keep the ball in motion at constant speed = FLsin90
= 0.026 x 0.6 x sin 90 = 0.0156 N
Answer:
The police will cite you for speeding.
Explanation:
To know if the police will cite you for speeding we need to find the average speed (v):
<u>Where:</u>
x(f): is the final distance = 39 mi
x(i): is the initial distance = 0
t(f): is the final time = 53 min = 0.88 h
t(i): is the initial time = 17 min = 0.28 h
Hence, the average speed is:
Therefore, since the limit speed is 60 mph and your speed is 65 mph, the police will cite you for speeding.
I hope it helps you!
The rocky object orbiting in space is most likely referred to as an asteroid.
<h3>What is an Asteroid?</h3>
This is referred to a rocky object which revolve around the sun and are considered too small to be called a planet.
Asteroids was observed with the use of a telescope and is around 250 km wide thereby making it the most appropriate choice.
Read more about Asteroids here brainly.com/question/11996385