when a body slides against a rough horizontal surface, the work done by friction is
Anonymous Quiz
21%
Positive
12%
Zero
58%
Negative
9%
Constant
If a force acts perpedicular to the direction of motion of a body, what is the amount of work done?
Anonymous Quiz
5%
Infinity
14%
Constant
70%
Zero
11%
one
What is the sign of the work done by gravity on a man standing on a platform?
Anonymous Quiz
23%
Positive
30%
Zero
30%
Negative
18%
Depend on a particular situation
What is the sign of the work performed on an object in uniform circular motion?
Anonymous Quiz
57%
Zero
24%
Positive
8%
Negative
11%
Depend on the particular situation
❤4
A constant force of 10 N causes a box to move at a constant speed of 2 m/s. How much work is done in 10 seconds?
Anonymous Quiz
42%
200J
33%
100J
21%
20J
4%
25J
A horizontal force of 5 N is required to maintain a velocity of 2 m/s for a block of 10 kg
mass sliding over a rough surface. Calculate the work done by this force in one minute.
mass sliding over a rough surface. Calculate the work done by this force in one minute.
Anonymous Quiz
15%
20J
40%
10J
30%
5J
15%
25J
A force F = (5i – 3j +2k) N moves a particle from r1 = (2i + 7j + 4k) m to r2 = (5i + 2j + 8k) m. What is the work done by the force?
Anonymous Quiz
18%
18 J
12%
28 J
65%
38 J
6%
48 J
The area under the force (F) versus displacement (x) graph gives work.
Anonymous Quiz
69%
True
31%
False
A force F = x + 1 N acts on a particle in x direction. What is the work done from x = 2m to 5 m?
Anonymous Quiz
22%
9.5J
48%
8.3J
22%
12.6J
9%
13.5J
In situations involving non conservative external force, the work done by these forces:
Anonymous Quiz
49%
Can be either positive or negative
24%
Is always equal to zero
22%
Is always positive
5%
Is always negative
If Birr 5000 is invested at a rate of 6% compounded quarterly ( 4 times a year), then how long does it take to double the investment?
Anonymous Quiz
18%
4.5 years
47%
11. 58 years
35%
17. 42 years
0%
6. 62 years
✨ Learn these 3 useful phrasal verbs with CUT!
🔹 CUT OFF — To disconnect or stop a supply. 🚰
Example: She cut off the water supply.
🔹 CUT DOWN (ON) — To reduce the amount of something. 🍬
Example: He cut down on sugar.
🔹 CUT OUT — To remove something by cutting. ✂️
Example: She cut out a heart shape. ❤️
@maths_group11
🔹 CUT OFF — To disconnect or stop a supply. 🚰
Example: She cut off the water supply.
🔹 CUT DOWN (ON) — To reduce the amount of something. 🍬
Example: He cut down on sugar.
🔹 CUT OUT — To remove something by cutting. ✂️
Example: She cut out a heart shape. ❤️
@maths_group11
❤3
Learn these 3 useful phrasal verbs with “BREAK” and use them confidently in everyday conversations! 🗣️📖
🔹 1. BREAK UP — To divide something into smaller parts.
✅ Example: Let’s break up the chocolate bar and share it. 🍫
🔹 2. BREAK OFF — To detach or separate a piece from something.
✅ Example: She broke off a piece of the cake. 🎂
🔹 3. BREAK APART — To separate into pieces or cause something to fall apart.
✅ Example: The vase fell and broke apart into pieces. 🏺
💡 Quick Tip:
🔸 Up = Divide
🔸 Off = Detach a piece
🔸 Apart = Separate into pieces
@maths_group11
🔹 1. BREAK UP — To divide something into smaller parts.
✅ Example: Let’s break up the chocolate bar and share it. 🍫
🔹 2. BREAK OFF — To detach or separate a piece from something.
✅ Example: She broke off a piece of the cake. 🎂
🔹 3. BREAK APART — To separate into pieces or cause something to fall apart.
✅ Example: The vase fell and broke apart into pieces. 🏺
💡 Quick Tip:
🔸 Up = Divide
🔸 Off = Detach a piece
🔸 Apart = Separate into pieces
@maths_group11
❤4
The solution set of the quadratic equation x² + 6x +8 = 0 is__________.
Anonymous Quiz
15%
{2, 4}
72%
{-4, -2}
5%
{-4, 2}
8%
{-2, 4}
What is the solution set of the system of linear equations x+ y = 7 and 2x +3y = -3 ?
Anonymous Quiz
46%
{(24, -17)}
36%
{(-17, 24)}
14%
{(-24, 17)}
4%
{(17, -24)}