Work and Energy of a softball

002 (part 1 of 4)
You throw a softball (of mass .350 kg) straight
up into the air. It reaches amaximum altitude
of 5.8 m and then returns to you.
What is the gravitational potential energy
of the softball at its highest position? Assume
the ball departed fromand returned to ground
level. Answer in units of J.
003 (part 2 of 4)
Assume no energy is lost by the softball while
it is in the air.
What is the kinetic energy of the softball as
soon as it leaves your hand? Answer in units
of J.
004 (part 3 of 4)
What is the kinetic energy of the softball when
it returns to your hand? Answer in units of
J.
005 (part 4 of 4)
What is the speed of the ball? Answer in
units of m/s.

2. Relevant equations
PE=massxgravityxdisplacement
KE=1/2xmassxvelocity(squared)
TE=PE+KE

3. The attempt at a solution

I solved for the first problem getting 19.894 Joules, but I ma having trouble solving for the second part. I can't seem to find the total energy.
 
316
2
Assume no energy is lost by the softball while
it is in the air.
What is the kinetic energy of the softball as
soon as it leaves your hand? Answer in units
of J.
004 (part 3 of 4)
Things fly when you provide them energy. In ideal situations, they reach their maximum height when all initial energy is converted into potential energy. So, you know the initial kinetic energy you provided to it.

Is this advanced physics question btw?
 

Want to reply to this thread?

"Work and Energy of a softball" You must log in or register to reply here.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Top Threads

Top