A 5000N block is lifted 10 m. How much work was done?
Anonymous Quiz
60%
50000J
12%
5000J
23%
500J
6%
50J
In which of these cases is work being done?
Anonymous Quiz
9%
A student sleeps
13%
A student pushes a locked door that does not move
73%
A student carries his chair into another room
5%
A student sits on the carpet
Work done by the force of friction
Anonymous Quiz
13%
Can be positive
29%
Can be negative
13%
Can be zero
46%
All of the above
when a body slides against a rough horizontal surface, the work done by friction is
Anonymous Quiz
21%
Positive
12%
Zero
55%
Negative
12%
Constant
If a force acts perpedicular to the direction of motion of a body, what is the amount of work done?
Anonymous Quiz
4%
Infinity
17%
Constant
70%
Zero
9%
one
What is the sign of the work done by gravity on a man standing on a platform?
Anonymous Quiz
24%
Positive
31%
Zero
31%
Negative
14%
Depend on a particular situation
What is the sign of the work performed on an object in uniform circular motion?
Anonymous Quiz
51%
Zero
33%
Positive
6%
Negative
10%
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
44%
200J
29%
100J
21%
20J
6%
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
19%
20J
38%
10J
27%
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
20%
18 J
15%
28 J
55%
38 J
10%
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
25%
9.5J
43%
8.3J
25%
12.6J
7%
13.5J
In situations involving non conservative external force, the work done by these forces:
Anonymous Quiz
42%
Can be either positive or negative
22%
Is always equal to zero
29%
Is always positive
7%
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
17%
4.5 years
43%
11. 58 years
30%
17. 42 years
9%
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
❤5