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Mila [183]
2 years ago
13

Calculate the work done by pulling an object through a distance of 30metres by a force of 220 newton

Physics
1 answer:
mote1985 [20]2 years ago
6 0

Answer:

6600J

Explanation:

the formula for work is: W= F x d

F- force, d- distance

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A piece of wire 26 m long is cut into two pieces. one piece is bent into a square and the other is bent into an equilateral tria
kiruha [24]
<span>a) All the 26m should be used to bent into a square to maximize the total area (= 42.25 m2) b) 1.4136m should be bent into a square and the rest (= 24.586m) should be bent into an equilateral triangle to minimize the total area (= 29.0835m2)</span>
8 0
3 years ago
A cue ball initially moving at 3.4 m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue b
romanna [79]

Answer:

speed of eight ball speed after the collision is 3.27 m/s

Explanation:

given data

initially moving v1i = 3.4 m/s

final speed is v1f = 0.94 m/s

angle = θ w.r.t. original line of motion

solution

we assume elastic collision

so here using conservation of energy

initial kinetic energy = final kinetic energy .............1

before collision kinetic energy = 0.5 × m× (v1i)²

and

after collision kinetic energy =  0.5 × m× (v1f)²  + 0.5 × m× (v2f)²

put in equation 1

0.5 × m× (v1i)² =  0.5 × m× (v1f)²  + 0.5 × m× (v2f)²

(v2f)² = (v1i)² - (v1f)²

(v2f)² = 3.4² - 0.94²

(v2f)² = 10.68

taking the square root both

v2f = 3.27 m/s

speed of eight ball speed after the collision is 3.27 m/s

5 0
3 years ago
Scientific laws explain_____.
arsen [322]

Howdy! I have your answer:

Scientific laws explain repeated observations that are experimental.

It also describes aspects of the universe.

~sofia

3 0
3 years ago
How do positive and negative acceleration differ?
Greeley [361]

Answer:

1. positive acceleration represents an object speeding up; negative acceleration represents an object slowing down

Explanation:

Acceleration is clearly defined as the rate of change of velocity with time. When are body is speeding up as we say, it is accelerating. When a body is coming to rest, it is decelerating.

Positive acceleration occurs when the speed of a moving continues to increase.

Negative acceleration is when the speed of a moving body reduces drastically.

4 0
3 years ago
Why doesn't the moon move away from the earth
Aleks04 [339]
The earths gravitational pull keeps the moon orbiting around and from straying away from it and into the vast expanses of outer space.
4 0
4 years ago
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