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4 years ago

Which force causes acceleration(gravity)(friction)(velocity )(energy)

Physics

2 answers:

icang [17]4 years ago

8 0

Velocity causes acceleration

Please vote brainliest!

Effectus [21]4 years ago

4 0

Hello :)

The answer to this problem I️ believe is Velocity. Velocity is the speed of something in any given direction, in general it is used for a term of speed or acceleration.

Hope this helps! ;)

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How can the IMA of a first- class lever be increased?

Dimas [21]

IMA = Ideal Mechanical Advantage

First class lever = > F1 * x2 = F2 * x1

Where F1 is the force applied to beat F2. The distance from F1 and the pivot is x1 and the distance from F2 and the pivot is x2

=> F1/F2 = x1 /x2

IMA = F1/F2 = x1/x2

Now you can see the effects of changing F1, F2, x1 and x2.

If you decrease the lengt X1 between the applied effort (F1) and the pivot, IMA decreases.

If you increase the length X1 between the applied effort (F1) and the pivot, IMA increases.

If you decrease the applied effort (F1) and increase the distance between it and the pivot (X1) the new IMA may incrase or decrase depending on the ratio of the changes.

If you decrease the applied effort (F1) and decrease the distance between it and the pivot (X1) IMA will decrease.

Answer: Increase the length between the applied effort and the pivot.

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4 years ago

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vredina [299]

Answer:

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Explanation:

5 0

3 years ago

Read 2 more answers

A 28 g bullet pierces a sand bag 29 cm thick. If the initial bullet velocity was 55 m/s and it emerged from the sandbag with 18

Bumek [7]

The correct answer to the question is 130.4 N.

CALCULATION;

The mass of the bullet is given as m = 28 gram = 0. 028 kg.

The initial velocity of the bullet u = 55 m/s

The final velocity of the bullet v = 18 m/s.

The distance covered by the bullet through the sand bag s = 29 cm.

= 0.29 m

Let the acceleration of the bullet is a .

From equation of kinematics, we know that-

$v^2-u^2=\ 2as$

⇒ $a=\ \frac{v^2-u^2}{2s}$

$=\ \frac{(18)^2-(55)^2}{2\times 0.29}\ m/s^2$

$=\ -4656.897\ m/s^2$

The negative sign is used due to the fact that force is opposing in nature. Its velocity is decreasing with time.

From Newton's second law of motion, we know that net force on a body is equal to the product of mass with acceleration.

Mathematically F = ma.

Hence, the frictional force exerted on the bullet is calculated as -

F = m × a

= 0.028 × (-4656.897) N

= -130.4 N [ANS]

Here, N ( newton) stands for the unit of force.

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3 years ago

A device has power -2 D . The device is

slavikrds [6]

Answer:

Explanation:

-vesign shows the lens is CONCAVE

f=1/power

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4 years ago

If an element has a charge of 1+, how many more protons does it have than electrons?

Vlada [557]

If an element has a charge of +1, there is 1 more proton than electrons.

A proton has a charge of +1
A neutron has a charge of 0
A electron has a charge of -1.

For there to be a charge of 0, there would be the same amount of charges for both proton and neutron. To get a charge of 1, you will need 1 more proton.

hope this helps

7 0

3 years ago