A force exerted over a distance to move an object is ______________________.
Anonymous Quiz
16%
Power
66%
Work
16%
Energy
3%
Momentum
A 5000N block is lifted 10 m. How much work was done?
Anonymous Quiz
60%
50000J
10%
5000J
23%
500J
6%
50J
In which of these cases is work being done?
Anonymous Quiz
10%
A student sleeps
12%
A student pushes a locked door that does not move
76%
A student carries his chair into another room
2%
A student sits on the carpet
Work done by the force of friction
Anonymous Quiz
11%
Can be positive
28%
Can be negative
12%
Can be zero
49%
All of the above
when a body slides against a rough horizontal surface, the work done by friction is
Anonymous Quiz
22%
Positive
12%
Zero
57%
Negative
10%
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
13%
Constant
73%
Zero
10%
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
16%
Depend on a particular situation
What is the sign of the work performed on an object in uniform circular motion?
Anonymous Quiz
56%
Zero
27%
Positive
7%
Negative
10%
Depend on the particular situation
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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
30%
100J
22%
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
14%
20J
45%
10J
27%
5J
14%
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
21%
9.5J
46%
8.3J
25%
12.6J
8%
13.5J
In situations involving non conservative external force, the work done by these forces:
Anonymous Quiz
46%
Can be either positive or negative
22%
Is always equal to zero
27%
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
16%
4.5 years
47%
11. 58 years
32%
17. 42 years
5%
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