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Katen [24]
3 years ago
7

How does the mass of an object change when it acquires a positive charge? 1. decreases 2. more information is needed. 3. increas

es 4. doesn't change?
Physics
1 answer:
Reika [66]3 years ago
8 0
1. Decreases

To make something positive you remove electrons so it decreases
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35.28km/hr

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A mass hangs on the end of a massless rope. The pendulum is held horizontal and released from rest. When the mass reaches the bo
drek231 [11]

Answer:

T = 37.5 N

Explanation:

As the pendulum reached to the lowest position then we will have

T - mg = \frac{mv^2}{L}

14.2 - m(9.81) = \frac{m(2.9^2)}{L}

now when it will reach to the height of the peg then its speed is given as

v_f^2 - v_i^2 = 2 a d

so we will have

v_f^2 - 2.9^2 = 2(-9.81)(\frac{L}{5})

v_f^2 = 2.9^2 - 3.924L

also we know that

2.9^2 - 0 = 2(9.81)(L)

L = 0.43 m

m = 0.48 kg

now we have speed of the pendulum when it reach the same height is given as

v_f^2 = 2.9^2 - (3.924(0.43)

v_f = 2.6 m/s

Now the tension in the string is given as

T = \frac{mv_f^2}{\frac{L}{5}}

T = \frac{0.48(2.6)^2}{\frac{0.43}{5}}

T = 37.5 N

6 0
4 years ago
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