A force exerted over a distance to move an object is ______________________.
Anonymous Quiz
18%
Power
62%
Work
16%
Energy
3%
Momentum
A 5000N block is lifted 10 m. How much work was done?
Anonymous Quiz
58%
50000J
12%
5000J
24%
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
75%
A student carries his chair into another room
2%
A student sits on the carpet
Work done by the force of friction
Anonymous Quiz
13%
Can be positive
27%
Can be negative
13%
Can be zero
47%
All of the above
when a body slides against a rough horizontal surface, the work done by friction is
Anonymous Quiz
23%
Positive
13%
Zero
55%
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
16%
Constant
70%
Zero
9%
one
What is the sign of the work done by gravity on a man standing on a platform?
Anonymous Quiz
23%
Positive
30%
Zero
32%
Negative
15%
Depend on a particular situation
What is the sign of the work performed on an object in uniform circular motion?
Anonymous Quiz
53%
Zero
31%
Positive
7%
Negative
9%
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
42%
200J
32%
100J
23%
20J
3%
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
21%
20J
42%
10J
25%
5J
13%
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
16%
18 J
16%
28 J
58%
38 J
11%
48 J
The area under the force (F) versus displacement (x) graph gives work.
Anonymous Quiz
68%
True
32%
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
23%
9.5J
46%
8.3J
23%
12.6J
8%
13.5J
In situations involving non conservative external force, the work done by these forces:
Anonymous Quiz
44%
Can be either positive or negative
23%
Is always equal to zero
26%
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
18%
4.5 years
45%
11. 58 years
27%
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