Two boxes on opposite ends of a massless board that is 3.0 m long. The board is supported in the middle by a fulcrum. The box on
1 answer:
Answer:
b. 1.1 m
Explanation:
It is given that the total distance between the masses is equal to the length of the board, which is 3 m. Therefore,
where,
s₁ = distance of fulcrum from left mass
s₂ = distance of fulcrum from right mass
In order to achieve balance, the torque due to both masses must be equal:
s₁ = 1.1 m
Hence, the correct option is:
<u>b. 1.1 m</u>
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Answer:
True.
Explanation:
- Applying the definition of average velocity, we know that we can always write the following expression:
(1)
- By definition, Δx is just the displacement, and Δt is the time interval.
- So, just rearranging terms in (1), we get:
Answer:
a
The image distance is
b
The image is real and inverted because the image distance in positive
c
The image is located to the left side
d
The magnification is
e
The image height is
f
The image is real and inverted because the image distance in positive
Explanation:
In the Solution We assume that the lens is converging
The lens Equation is mathematically represented as
Where f is the focal length = 4.20 cm
v is the image distance = ?
u is the object distance = + 1.5 (since is to the left i.e the source of light )
Making v the subject in the equation above
Mathematically magnification is represented as
Mathematically the image height is represented as
Where is the image height
is the object height = 1.5