Answer:
The two forces acting on a boat or some other floating object are buoyancy and gravity
Answer: D
Explanation: The chemical bonds in the food store energy that is released when we eat it.
The work done by the electric field when moving the charge from a to b is 0.0378 J.
<h3>
Distance between a and b</h3>
r = √[(a₂ - a₁)² + (b₂ - b₁)²]
r = √[(3 - 6)² + (4 - 0)²]
r = 5 m
<h3>Work done in moving the charge</h3>
W = Fr
W = kq₁q₂/r
W = (9 x 10⁹ x 2.1 x 10⁻⁵ x 1 x 10⁻⁶)/(5)
W = 0.0378 J
Thus, the work done by the electric field when moving the charge from a to b is 0.0378 J.
Learn more about work done here: brainly.com/question/8119756
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Answer:
The angular acceleration of the rod is 2 rad/s².
(a) is correct option.
Explanation:
Given that,
Mass of string = 5.00 kg
Radius = 0.100 m
Mass of disk = 125 kg
Radius of disk = 0.2 m
We need to calculate the acceleration
Using balance equation

Put the value of m
....(I)
We need to calculate the tension
Using balance equation




Put the value into the formula

....(II)
From equation (I) and (II)

Put the value into the formula


We need to calculate the angular acceleration of the rod
Using formula of angular acceleration

Put the value into the formula


Hence, The angular acceleration of the rod is 2 rad/s².