Apply the law of conservation of energy to determine the ball's speed

AI Thread Summary
To determine the ball's speed after falling 1.1 m and 2.2 m, apply the law of conservation of energy, which states that potential energy converts to kinetic energy. The gravitational potential energy formula (PE = mgh) calculates the initial energy, while the kinetic energy formula (KE = 0.5mv²) helps find the speed. For a drop of 1.1 m, the speed is calculated to be 4.6 m/s, and for a full drop of 2.2 m, the speed is 6.6 m/s. Ignoring air resistance simplifies the calculations. Understanding these energy transformations is key to solving similar problems.
Nicholasw
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What formula would I use to solve for a and b?

A 0.20-kg ball is held at rest 2.2 m above the ground, and then it is dropped. Apply the law of conservation of energy to determine the ball's speed after it has fallen (a) 1.1 m and (b) 2.2 m. Ignore air resistance.

Answers
(a) 4.6 m/s
(b) 6.6 m/s

So How would I get these answers?

Thanks
 
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You use two formulas; the one ofr gravitational potential energy and the one for kinetic energy.
 
have a look at this thread
 
Okay Thanks. I will do that
 
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