2 years ago

Please help with an explanation for 30 points even if u only do one (but with good explanation)

Physics

1 answer:

Illusion [34]2 years ago

8 0

Answer:

1- 4Ω

Explanation:

if 2Ω is 2 meters, than 4 metres is 4Ω

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Susan's 12.0 kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30∘ above the

Pavlova-9 [17]

Answer:1.71 m/s

Explanation:

Given

mass of Susan $m=12 kg$

Inclination $\theta =30^{\circ}$

Tension $T=29 N$

coefficient of Friction $\mu =0.18$

Resolving Forces Along x axis

$F_x=T\cos \theta -f_r$

where $f_r=friction\ Force$

$F_y=mg-N-T\sin \theta$

since there is no movement in Y direction therefore

$N=mg-T\sin \theta$

and $f_r=\mu N$

Thus $F_x=T\cos \theta -\mu N$

$F_x=29\cos (30)-\0.18\times (12\times 9.8-29\sin (30))$

$F_x=25.114-18.558$

$F_x=6.556 N$

Work done by applied Force is equal to change to kinetic Energy

$F_x\cdot x=\frac{1}{2}\cdot mv_f^2-\frac{1}{2}\cdot mv_i^2$

$6.556\times 2.7=\frac{1}{2}\cdot 12\times v_f^2$

$v_f^2=\frac{6.556\times 2.7\times 2}{12}$

$v_f^2=2.95$

$v_f=1.717 m/s$

8 0

2 years ago

Physics - Electricity and Magnetism

Orlov [11]

Answer:

Explanation:

because the unit for resistance is in ohms

4 0

2 years ago

B. Find the centripetal force needed to keep an 60.0 kg rider traveling in a circle in the ride.

schepotkina [342]

Answer:

loloololo

lol

Explanation:

lolloolololo

8 0

2 years ago

Which has greater kinetic energy, a car traveling at 30 km/hr or a car of half the mass traveling at 60 km/hr?

Mumz [18]

Half mass car because it's traveling faster

5 0

2 years ago

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Please help! you are amazing! brainliest too!

german

I think it’s B hope it helps:)

6 0

2 years ago

Read 2 more answers