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Troyanec [42]
3 years ago
15

What determines whether or not work is being done

Physics
1 answer:
nordsb [41]3 years ago
6 0

In order for work to be done a force must be transferred and the object must move.


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Derive equation of motion s=ut+1/2at²​
Pavel [41]

Recall the definitions of

• average velocity:

v[ave] = ∆x/∆t = (x[final] - x[initial])/t

Take the initial position to be the origin, so x[initial] = 0, and we simply write x[final] = s. So

v[ave] = s/t

• average acceleration:

a[ave] = ∆v/∆t = (v[final] - v[initial])/t

Assume acceleration is constant (a[ave] = a). Let v[initial] = u and v[final] = v, so that

a = (v - u)/t

Under constant acceleration, the average velocity is also given by

v[ave] = (v[final] + v[initial])/2 = (v + u)/2

Then

v[ave] = s/t = (v + u)/2   ⇒   s = (v + u) t/2

and

a = (v - u)/t   ⇒   v = u + at

so that

s = ((u + at) + u) t/2

s = (2u + at) t/2

s = ut + 1/2 at²

4 0
2 years ago
E Which of the following particles that may be emitted in radioactive decay is not ionising?
mestny [16]

Explanation:

C. neutron.

it does not contain ionizing characteristics.

hope it helps. :)

5 0
3 years ago
Pls help on midtermgggggggggggggggggg
Lady_Fox [76]

Answer:

A

Explanation:

Pushing a car up a steep hill is the most work. First of all a car is heavy. Secondly, its hard to walk up a steep hill let alone push a car up one.

Answer:

D

Explanation:

Jack nd Jill did the same amount of work but jack had more power

Please give brainlist

3 0
3 years ago
Near the poles, more energy is reflected back into space than is absorbed. near the poles, more energy is reflected back into sp
VladimirAG [237]
Correct answer: a) True.

In fact, the soil at the poles consists mainly of snow. Snow has an albedo of 90%: albedo is the fraction of light (and so, of energy) that is reflected back to the space. This means that at the poles, about 90% of the light is reflected back to the space, while only 10% is absorbed.
7 0
3 years ago
. Explain how an oscillating telephone pole is similar to an oscillating tuning fork
Elan Coil [88]
To oscillate is to move or swing back and forth at a regular speed. 
An oscillating telephone pole is similar to an oscillating tuning fork because they are both swinging back and forth, but the tuning forth is most likely oscillating at a much higher speed. 
3 0
3 years ago
Read 2 more answers
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