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3 years ago

If we decrease the amount of force, and kelp all other factors the same, what will happen to the amount of work?

Physics

1 answer:

Artist 52 [7]3 years ago

8 0

Answer:

Distance will decrease and work will decrease:

F = m a Newton's Second Law

a = F / m decreasing force will decrease acceleration

S = 1/2 a t^2 = 1/2 (F / m) t^2 distance traveled will decrease as force decreases

W = F * S work will decrease as both force and distance decrease

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A container explodes and breaks into three fragments that fly off 120° apart from each other, with mass ratios 1: 4: 2. If the f

RSB [31]

Answer:

V₂ = 1.5 m/s

Explanation:

given,

speed of the first piece = 6 m/s

speed of the third piece = 3 m/s

speed of the second fragment = ?

mass ratios = 1 : 4 : 2

fragment break fly off = 120°

α = β = γ = 120°

sin α = sin β = sin γ = 0.866

using lammi's theorem

$\dfrac{A}{sin\alpha}=\dfrac{B}{sin\beta}=\dfrac{C}{sin\gamma}$

A,B and C is momentum of the fragments

$\dfrac{m\times 6}{0.866}=\dfrac{4m\times v_2}{0.866}=\dfrac{2m\times 3}{0.866}$

4 x V₂ = 2 x 3

V₂ = 1.5 m/s

3 0

3 years ago

If a simple truss member is known to carry a tensile force, then the internal force drawn on a free-body at a section cut when u

mote1985 [20]

Answer: b) pointed toward and parallel to the member.

Explanation:

It is shown in the picture attached

6 0

3 years ago

Is it true or false that the displacement always equals the product of the average velocity and the time interval?

Cloud [144]

Answer:

True.

Explanation:

Applying the definition of average velocity, we know that we can always write the following expression:

$v_{avg} = \frac{\Delta x}{\Delta t}$ (1)

By definition, Δx is just the displacement, and Δt is the time interval.
So, just rearranging terms in (1), we get:

$\Delta x} = v_{avg}* {\Delta t}$

5 0

3 years ago

A train travels 58 km in two hours and 71 km in four hours what is its average speed

o-na [289]

Speed is given as distance divided by time. I think that first you should simplify the two rates 58/2=29km/hr and 71/4=17.75km/hr After that find the mean or average which is (29+17.75)/2=23.375km/hr
Therefore it is safe to say that the average speed of the train is 23.375km/hr. I am not sure about this.

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4 years ago

Name two objects that both use electric motors and are commonly found in houses

Natali [406]

There's the fan over the stove and in the microwave oven, the dispose-all under the sink, the blender, the washer, the dryer, vacuum cleaner, hair dryer, and there are many in a computer.

Hope this helps!

3 0

3 years ago

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