Who's wrong? I think the correct numbers would be 17 and 18, not 18 and 19.
1 answer:
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Answer:
43740 N and attractive force
Explanation:
Given that,
Charge 1, q₁ = -54.0 μC
Charge 2, q₂ = +36.0 μC
The distance between charges, r = 2 cm = 0.02 m
We need to find the force between charges. The formula for the force between charges is given by :
Put all the values,
As the charges are opposite, the force between them is attractive. Hence, the required force is 43740 N.
Answer:
5.5 kg
Explanation:
The gravitational potential energy of an object is given by
where
m is its mass
g is the acceleration of gravity
h is the height of the object above the ground
For the rock in the problem, we know:
h = 12 m is the height above the ground
U = 650 J
g = 9.8 m/s^2
Therefore, we can solve the equation for m, the mass of the rock: