With an acceleration of 4.0 m/s², the bottle attains a speed of
(4.0 m/s²) * (9.0 s) = 36 m/s
so that the slide has length ∆<em>x</em> such that
(36 m/s)² - 0² = 2 * (4.0 m/s²) * ∆<em>x</em>
==> ∆<em>x</em> = 162 m ≈ 160 m
Alternatively, we know the bottle covers a distance ∆<em>x</em> with acceleration <em>a</em> at time <em>t</em> according to
∆<em>x</em> = 1/2 <em>a</em> <em>t</em>²
so that
∆<em>x</em> = 1/2 * (4.0 m/s²) * (9.0 s)² = 162 m ≈ 160 m
Dr. Hewitt's experiment using the bowling ball to showcase the relationship between <em>momentum, energy and speed</em> of a body in motion. In his first attempt, the ball returns and stops almost exactly at the point it was launched.
- In Dr.Hewitt's first trial with the bowling ball, the ball was launched without any additional force applied, hence, the initial energy during the launch was converted to same amount of potential energy on the ball's return. Hence, stopping at the same point where the ball was launched.
- In subsequent trials, when extra force was applied, the ball went past the <em>initial launch position</em> as the potential energy as the ball returned was higher.
Therefore, the ball stopped at the <em>position of initial launch</em> during the first trial.
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Answer:
the mechanical advantage is 10
Explanation:
The computation of the mechanical advantage is as follows:
Mechanical advantage is
= Load ÷ Effort
where,
The Loan is equivalent to the weight i.e. 500 lb
And, the effort is equivalent to the force applied i.e. 50lb
So, the mechanical advantage is
= 500 ÷ 50
= 10
Hence, the mechanical advantage is 10