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Georgia [21]
3 years ago
5

When you rub two balloons on your sleeve, does it have positive or negative?

Physics
2 answers:
igomit [66]3 years ago
6 0

When you rub the balloons, it will take electrons away, which is negative. So, the balloons are negative
valentina_108 [34]3 years ago
3 0
Well the balloon has both positive and negative because the positive electricity is on your sleeve, and the negative is on the balloon. So the act of you rubbing your sleeve and balloon together transfers both negative and positive electricity. So both.  <span />
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A cart loaded with bricks has a total mass of 20.4 kg and is pulled at constant speed by a rope. The rope is inclined at 26.1 ◦
Readme [11.4K]

Answer:

Normal force, N = 154.5 N

Explanation:

Given that,

Total mass of the cart, m = 20.4 kg

Angle of inclination, \theta=26.1^{\circ}

Distance moved, d = 20.1 m

The coefficient of kinetic friction between ground and cart is 0.6

The value of acceleration due to gravity, g=9.8\ m/s^2

Let N is the normal force exerted on the cart by the floor. It is given by :

N=mg-T\ sin\theta

T\ cos\theta=\mu N

T\ cos\theta=\mu (mg-T\ sin\theta)

T\ cos(26.1)=0.6 (20.4\times 9.8-T\ sin(26.1))

T = 103.23 N

So, the normal force is :

N=20.4\times 9.8-103.23\ sin(26.1)

N = 154.5 N

So, the normal force exerted on the cart by the floor is 154.5 N. Hence, this is the required solution.

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