Answer:
Explanation:
MA ( Mechanical Advantage ) is always less than VR ( Velocity Ratio ) because <u>MA</u><u> </u><u>is</u><u> </u><u>reduced</u><u> </u><u>by</u><u> </u><u>friction</u><u> </u><u>but</u><u> </u><u>VR</u><u> </u><u>is</u><u> </u><u>not</u><u> </u><u>affected</u><u> </u><u>by</u><u> </u><u>friction</u><u>.</u>
Hope I helped!
Best regards! :D
Answer:
<em><u>Here's a list of the 10 most common mistakes </u></em>we humans make when operating an automobile.
Crossing Lanes While Turning.
Using Your Daylights At Night. ...
Bad Seating Position. ...
Riding The Brakes. ...
Leaving Your High Beams On. ...
Not Using Your Turn Signal. ...
Driving Slowly In The Passing Lane. ...
Not Adjusting The Mirrors Properly. ...
Force = 3200 N
Work done = 640, 000 Nm
Explanation:
We begin by calculating the deceleration of the truck, using the velocity and distance;
a = (v² – u²)/2s
whereby;
a = acceleration
v = initial velocity
u = initial velocity
s = distance
We begin by changing the speed from km/h into m/s;
54km/hr = 15m/s
Then acceleration;
a = (0² – 15²) / 2 * 200
a = -225 / 400
a = - 0.5625 m/ s²
To calculate force;
F = ma
Whereby;
F = force
M = mass (in kgs)
a = acceleration
F = 1800 / 0.5625
F = 3200 N
Work done = Force * displacement
Work done = 3200 * 200
= 640, 000 Nm
Learn More:
For more on force and work done check out;
brainly.com/question/8662583
brainly.com/question/1268612
brainly.com/question/11870590
brainly.com/question/9125094
#LearnWithBrainly
Answer:
Electrons revolves around the nucleus in a fixed orbits with fixed energy.
electron clouds.
Explanation:
Rutherford in his model of atom explained:
- Maximum space inside the atom is empty.
- Electron revolves around the the center called nucleus.
- Nucleus contains the positive charge.
Bohr's in his model explained that:
- Electrons revolves around the nucleus in a fixed orbit named as shells.
- Each orbits or shells has fixed amount of energy and size.
