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3 years ago

A car traveled north 25 km for 1 hour. The car’s SPEED is 25 km/hr north.

Physics

1 answer:

kramer3 years ago

6 0

Answer:

hgk

Explanation:

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A 1.53-kg bucket hangs on a rope wrapped around a pulley of mass 7.07 kg and radius 66 cm. This pulley is frictionless in its ax

levacccp [35]

Answer:

$\alpha = 6.431\,\frac{rad}{s^{2}}$

Explanation:

The pulley is modelled by the Newton's Laws, whose equation of equilibrium is:

$\Sigma M = T \cdot R = \frac{1}{2}\cdot M \cdot R^{2}\cdot \alpha$

Given that tension is equal to the weight of the bucket, the angular acceleration experimented by the pulley is:

$T = \frac{1}{2}\cdot M \cdot R \cdot \alpha$

$m_{b}\cdot g = \frac{1}{2}\cdot M \cdot R \cdot \alpha$

$\alpha = \frac{2\cdot m_{b}\cdot g}{M\cdot R}$

$\alpha = \frac{2\cdot (1.53\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)}{(7.07\,kg)\cdot (0.66\,m)}$

$\alpha = 6.431\,\frac{rad}{s^{2}}$

7 0

3 years ago

QUICK PLZ I NEED TO TURN IT IN

Anni [7]

The answer i got is 133.3 but i’m not completely sure . I got that because to get velocity i’m pretty sure it’s distance over time. So in between 8 and 10 minutes it’s 9 minutes. I pretty much just did 1200 divided by 9.

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3 years ago

Read 2 more answers

.Roshan applied a force of 144 N to the side of a cube-shaped wooden block to slide it away from himself . Assuming that he appl

ExtremeBDS [4]

side of cube=4cm

Area=side^2=4^2=16cm^2=0.0016m^2

Force=144N

$\\ \sf\longmapsto Pressure=\dfrac{Force}{Area}$

$\\ \sf\longmapsto Pressure=\dfrac{144}{0.0016}$

$\\ \sf\longmapsto Pressure=90000Pa$

3 0

3 years ago

The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 7.26 m, measured from its tip to

Elan Coil [88]

Answer:

$\frac{a_1}{a_2}=1.67$

Explanation:

The equation for centripetal acceleration is $a_{cp}=r\omega^2$ . If $r_1=7.26m$ is the distance from the center of the point at the tip of the blade and $r_2=4.35m$ is the distance from the center of another point in the blade, and since both points are rotating at the same angular velocity $\omega$ because both of them belong to the blade, the ratio between their centripetal accelerations will be:

$\frac{a_1}{a_2}=\frac{r_1 \omega^2}{r_2 \omega^2}=\frac{7.26m}{4.35m}=1.67$

5 0

3 years ago

ANSWER ASAP What happens to a circuit’s resistance (r) , voltage (v) , and current (l) when you decrease the length of the wire

sertanlavr [38]

Answer:A

Explanation:i just took the test

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2 years ago