2 years ago

7. How much time does it take a person to walk 8

Physics

1 answer:

Mashcka [7]2 years ago

5 0

So it’s 4km/h

We divide 8/4

2 hours

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Your friend is constructing a balancing display for an art project. She has one rock on the left ( ms=2.25 kgms=2.25 kg ) and th

Firdavs [7]

Answer:

Torque = 35.60 N.m (rounded off to 3 significant figures.

Explanation:

Given details:

The mass of the rock on the left, ms = 2.25 kg

The total mass of the rocks, mp = 10.1 kg

The distance from the fulcrum to the center of the pile of rocks, rp = 0.360 m

(a) The torque produced by the pile of rock, T = F*rp = m*g*rp

Torque = 9.8*0.360*10.1 = 35.6328

Torque = 35.60 N.m (rounded off to 3 significant figures).

5 0

3 years ago

A student throws a water balloon with speed v0 from a height h = 1.82 m at an angle θ = 29° above the horizontal toward a target

3241004551 [841]

Answer:

$v_o = 7.76 m/s$

Explanation:

As we projected the balloon at speed vo at an angle of 29 degree

so the two component of velocity is given as

$v_x = v_ocos29 = 0.875 v_o$

$v_y = v_o sin29 = 0.485 v_o$

now we know that in x direction we have

$d = v_x t$

$7.5 = 0.875 v_o t$

$v_o t = 8.57$

in y direction we have

$- 1.82 = (0.485 v_o) t - \frac{1}{2}gt^2$

$-1.82 = 0.485(8.57) - 4.9 t^2$

$t = 1.1 s$

now we have

$v_o = 7.76 m/s$

7 0

3 years ago

The cement bag shown in the figure has a mass of 50 kg and the small pulley has a mass of 2 kg. If the cement bag is pulled upwa

GuDViN [60]

For the cement bag we can say as per its force diagram we will have

$2F - mg = ma$

here we will have

$m = 50 kg$

$a = 2 m/s^2$

now we will have

$F = \frac{mg + ma}{2}$

now plug in all data

$F = \frac{50(9.8 + 2)}{2}$

$F = 295 N$

so the pulling force will be 295 N

3 0

3 years ago

What is your hypothesis (or hypotheses) for this experiment?<br><br> (about Thermal Energy Transfer)

Nesterboy [21]

Answer:

I hypothesis that the motion involving the balls in the experiment were moving to create data.

Explanation:

I hope this helps!

3 0

3 years ago

What is the key difference between mechanical and electromagnetic waves

Alecsey [184]

Mechanical waves require a medium to travel, but electromagnetic waves do not.

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3 years ago