A triangle is the symbol used to indicate a fulcrum in a lever, a triangle has three sides and three vertices.
<h3>What is a fulcrum?</h3>
A fulcrum is a pivot that has a base and a point that serves as a balance for a lever.
<h3>What is a lever?</h3>
Basically a lever is a simple machine that is a beam with two sides pivoted to fulcrum.
A lever has Load, Effort and the last part is fulcrum
Learn more about fulcrum here:
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Explanation:
Table A: Calculation of Density for Regularly Shaped Solids
Table tennis ball Golf ball
"Mass
(g)"
Diameter (cm)
Radius (cm)
Estimated volume (cm3)
Estimated density (g/cm3)
"Prediction of buoyancy
Circle one."
"Observation of buoyancy
Circle one."
Initial volume of water (cm3)
Final volume of water (cm3)
Change in volume (cm3)
Calculated density (g/cm3)
Error (%)
The speed of sound follows the same rules, just like any other speed, if the acceleration is zero.
distance = speed * time
distance = 2m
speed = 333m/s
Solve for time t.
Given that,
For glasses:
distance, s = 42 m
a= -g = -9.81 m/s²
we can calculate time taken by glasses to hit the ground as follow:
s= Vi* t + 1/2 at²
Since at top initial velocity, Vi= 0
42 = 0 - 0.5* 9.81 t²
t = 2.926 s
Pen is drop 2 second after the glasses is dropped. So time difference will be:
Δt = 2.926 - 2 = 0.926 s
Distance covered by Pen in 0.926 s can be calculated as:
s = 0 - 0.5* 9.81 * 0.926²
s= 4.2 m
Distance of pen from ground will be, 42-4.2 = 37.8 m
When the glasses hit the ground, the pen will be 37.8 m above the ground.