If an inclined plane of 4m length and 1m height has an efficiency of 0.5, what is its mechanical advantage?
Anonymous Quiz
10%
3
78%
2
11%
5
2%
6
Which one of the following statement is true about the classes of lever in simple machines?
Anonymous Quiz
51%
In 2nd class lever, load is located between effort and fulcrum.
25%
In 3rd class lever, fulcrum is located between load and effort.
15%
In 1st class lever, effort is located between fulcrum and load.
8%
In 2nd class lever, VR is less than MA.
Which one of the following statement is true about simple machines?
Anonymous Quiz
12%
If the machine is speed multipliers, then its VR > 1 due to its distance moved by load is large.
31%
If the machine is force multipliers, then its MA is greater than VR due to its load is large.
26%
If the machine has no energy loses, its efficiency is greater than 1 due to its MA is equal to VR.
31%
If the machine is force multipliers, its VR > 1 due to its distance moved by load is less.
If the efficiency of one machine is 100%, then which one of the following is not true?
Anonymous Quiz
12%
Its velocity ratio is equal to MA.
20%
Its IMA is equal to its AMA.
27%
There is no energy loses in the machine.
41%
The types of machines must be inclined plane, screw, and wedge to get 100% efficiency.
A 200N force is required to be applied at one end of 1m long lever. If the distance from the effort to fulcrum is 80cm, inorder to lift a load of 600N placed at the other end. What is the efficiency of the lever?
Anonymous Quiz
17%
83%
47%
75%
15%
17%
21%
25%
👍2
Which one of the following is NOT true about pulley systems?
Anonymous Quiz
26%
Fixed pulley has velocity ratio of 2.
21%
Movable pulley has velocity ratio of 2.
35%
Compound pulley is a combination of fixed and movable pulley.
18%
Fixed pulley has no mechanical advantage.
Forwarded from Maths Group11
❤2
Aster is as ____________ as Tola.
Anonymous Quiz
72%
short
14%
shorter than
7%
the shortest
7%
shorter
❤6
❤6
He enjoys _________ to music everyday.
Anonymous Quiz
27%
listen
59%
listening
10%
to listen
3%
listened
The book ____________ by our teacher a year ago.
Anonymous Quiz
17%
is written
71%
was written
9%
wrote
3%
were written
Before she reached to us, we ____________ her for a long time.
Anonymous Quiz
9%
have waited
33%
have been waiting
30%
had waited
28%
had been waiting
❤1
What is the sum of the roots of quadratic equation x² + 5x + 6 = 0 ?
Anonymous Quiz
18%
6
20%
-6
25%
5
36%
-5
❤1
Let A = {1,3,5,7} and B = {2, 4, 6, 8}, then what is A intersection of B?
Anonymous Quiz
85%
{ }
3%
{1}
7%
{1, 3}
5%
{{2, 3}, 5}
What is the domain of a function f(x) = 3x -3 ?
Anonymous Quiz
74%
All real numbers
11%
Positive real numbers
7%
Negative real numbers
8%
All real numbers except zero
❤1
Given data: 1,7, 4, 7, 3, 2, 9, 6, 12, 7, then what is mode of the data?
Anonymous Quiz
7%
11
83%
7
6%
4
4%
9
Given two vectors: V = (1, 2), and U = (3, 3), then what is V+U ?
Anonymous Quiz
90%
4i + 5j
4%
-2i - j
4%
2i + j
2%
-4i - 5j
Forwarded from Maths Group11
❤3