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sleet_krkn [62]

4 years ago

15

Can anyone help me with this physics problem?

1 answer:

JulijaS [17]4 years ago

3 0

Yes that seems s lil tricky so sorry I cant help you so so sorry.

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A ball rolling on grass has more friction than a ball rolling on tile

Dmitry_Shevchenko [17]

Answer:

When you slide an object there is less friction than when you roll it. an object's acceleration (change in speed) depends on the mass of the object and the amount of force applied on it. an object at rest stays at rest unless a force acts on it. ... A ball rolling on grass has more friction than a ball rolling on tile.

6 0

3 years ago

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A force does 128-J of work on a 4-kg cart. What mus be the velocity of the cart?

LenKa [72]

Answer:

v = 8[m/s]

Explanation:

In this case, the work that is exerted on the cart is the kinetic energy that allows the movement, so we can use the following equation of kinetic energy.

$E_{kin}=Work\\E_{kin}=\frac{1}{2} *m*v^{2}$

Now replacing:

$128=0.5*4*v^{2} \\v=\sqrt{64} \\v=8[m/s]$

4 0

3 years ago

The left side of the heart creates a pressure of 120 mm Hg by exerting a force directly on the blood over an effective area of 1

jeka57 [31]

Answer:

23.99N

Explanation:

Given:

Pressure created by the heart = 120mm of hg

converting the pressure into the standard unit of N/m²

1mm of hg = $\frac{1}{760}atm=\frac{1}{760}\times 1.013\times10^5N/m^2$

now, 120 mm of hg in N/m² will be

120mm of hg = $\frac{12}{760}\times 1.013\times10^5N/m^2$

also

given effective area = 15.0 cm² = 15 × 10⁻⁴m²

Now,

Force = Pressure × Area

thus,

Force exerted will be = $\frac{120}{760}\times 1.013\times10^5N/m^2$ × 15 × 10⁻⁴m²

or

Force exerted will be = 23.99N

4 0

3 years ago

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3. Luckily, you defeated the trolll Now you have to defeat a three eyed raven to defeat the raven, you must roll the sided

cluponka [151]

Answer:

5/11 chance to beat the raven

its harder to beat the troll

Explanation:

im pretty sure

7 0

3 years ago

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A weightlifter lifts a weight of 500 N from the ground over her head, a distance of 1.8 m. How much work has been done to move t

Maksim231197 [3]

Answer is 900N

Hope this helps c:

3 0

3 years ago