Football helmets that are made with padding are believed to have reduced head injuries especially when a player accidentally collides with an object. This is because the impact of the collision is decreased due to the padding that serves as a shock absorber.
Answer:
There are seven fundamental physical quantities they are: length, mass, time, electric current, temperature, amount of substance, and light intensity.
The total force on the ground due to the bricks is 47,040 N.
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Total force on the ground</h3>
The total force on the ground due to weight of the bricks is calculated as follows;
Fₙ = mg
where;
- Fₙ is normal force
- m is mass of the brickes
- g is acceleration due to gravity
Fₙ = (1500 x 3.2) x 9.8
Fₙ = 47,040 N
Thus, the total force on the ground due to the bricks is 47,040 N.
Learn more about total force here: brainly.com/question/14361879
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To solve this we are going to use the formula for ideal mechanical advantage:

where

is the machine mechanical advantage

is the input distance

is the output distance
We know for our problem that

and

. Lets replace those values in our formula to find

:



The ideal machine advantage of the machine is 3. The inventor is claiming that the actual mechanical advantage of the machine is 4. Since the actual mechanical advantage takes into account energy losses, it is always less than the ideal mechanical advantage.
We can conclude that the developer's claim is false.