A fabric store sells two types of ribbon.<span> One customer buys </span>3 rolls<span> of the lace ribbon and </span>2 rolls<span> of the satin ribbon and has a total of </span>120 yards<span> of ribbon.</span><span> Another customer buys </span>2 rolls<span> of the lace ribbon and </span>4 rolls<span> of the satin ribbon and has a total of </span>160 yards<span> of ribbon.</span>
How many yards are on one roll of lace ribbon and one roll of satin ribbon?
<span><span>There are </span>20 yards<span> on one roll of lace ribbon and there are </span>30 yards<span> on one roll of satin ribbon.</span>
<span>There are </span>30 yards<span> on one roll of lace ribbon and there are </span>20 yards<span> on one roll of satin ribbon.</span>
<span>There are </span>40 yards<span> on one roll of lace ribbon and there are </span>10 yards<span> on one roll of satin ribbon.</span>
<span>There are </span>10 yards<span> on one roll of lace ribbon and there are </span>40 yards<span> on one roll of satin ribbon.</span></span>
Answer:
51.96 m/s^-1
Explanation:
a) see the attachment
b) As we know the velocity of the projectile has two component, horizontal velocity v_ox. and vertical velocity v_oy as shown in the figure. At the highest point of the trajectory, the projectile has only horizontal velocity and vertical velocity is zero. Therefore at the highest point of the trajectory, the velocity of the projectile will be
v_ox=v_o*cosФ
=60*cos (30)
= 51.96 m/s^-1
Answer:
F = 0.535 N
Explanation:
Let's use the concepts of energy, at the highest and lowest point of the trajectory
Higher
Em₀ = U = mg y
Lower
= K = ½ m v²
Emo =
mg y = ½ m v2
v = √ 2gy
y = L - L cos θ
v = √ (2g L (1-cos θ))
Now let's use Newton's second law n at the lowest point where the acceleration is centripetal
F = ma
a = v² / r
In turning radius is the cable length r = L
F = m 2g (1-cos θ)
Let's calculate
F = 2 1.25 9.8 (1 - cos 12)
F = 0.535 N
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- Speaker . . . sound energy
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- Television . . . light energy (from the screen) and sound energy
- Ceiling Fan . . . kinetic energy (of the spinning fan, then of the air)
- Stove . . . thermal (heat) energy
- Washing Machine . . . kinetic energy (of the tub and stirrer, then of the water and clothes)