Answer: 8.3 hours
Explanation:
time= distance divided by speed so:
150 divided by 18= 8.3 hours
Work done = force * distance
2m * 9.8
work done = 19.6 J
Answer:
A. 1.125×10^-7 kgm^2
B. 6.64875 rad/s
Explanation:
The moment of inertia is defined as a quantity expressing a body's tendency to resist angular acceleration, which is the sum of the products of the mass of each particle in the body with the square of its distance from the axis of rotation.
A. Moment of inertia = m1✖r1^2
=1.80 x (2.5x10^-4)^2
= 6.25x10^8 x 1.80
= 1.125 x 10^-7 kgm^2.
B. w is represented as Angular speed.
V is velocity, T is time in period.
Velocity= distance / time.
V= 2.5x10^-4 / 0.940
V= 2.6595 metre per seconds
w= v/r
w= 2.6595 / 0.400
w= 6.64875 rad/s.
The materials that are conductors are Metal doorknob, Silver, Gold, Copper, Metal coat hanger, Paper clip, while insulators are Carpet, Wood, Rubber, Bulletin board, Clothing, Plastic.
<h3>
What are electric conductors?</h3>
Conductors are materials that allow electric current to pass through them.
<h3>What are Insulators?</h3>
Insulators are materials that do not allow electric current to pass through them.
<h3>Examples of conductors</h3>
- Metal doorknob
- Silver
- Gold
- Copper
- Metal coat hanger
- Paper clip
<h3>Examples of insulators</h3>
- Carpet
- Wood
- Rubber
- Bulletin board
- Clothing
- Plastic
Learn more about conductors and insulators here: brainly.com/question/492289
