Answer:
2.55 m/s
Explanation:
A 3.00-kg crate slides down a ramp. the ramp is 1.00 m in length and inclined at an angle of 30° as shown in the figure. The crate starts from rest at the top, experiences a constant friction force of magnitude 5.00 N, and continues to move a short distance on the horizontal floor after it leaves the ramp. Use energy methods to determine the speed of the crate at the bottom of the ramp.
Solution:
The work done by friction is given as:
The work done by gravity is:
Answer:
a
b
Explanation:
From the question we are told that
The near point distance is
The distance of the glasses from the eye is
The distance of an object she can focus with the glass is
Generally the image distance is mathematically evaluated as
Generally the object distance is mathematically represented as
The negative sign tells us that the image was formed behind the eye
Generally the lens formula is mathematically represented as
=>
=>
converting to meters
Thus the refractive power is mathematically represented as
=>
=>