PHYSICS helppppp
posted by Katrina .
A 0.2 kilogram baseball is thrown vertically downwards towards to the same horizontal floor. The baseball possesses an initial velocity of 30 meters per second. The height is 10.00m.
(A) Calculate the POTENTIAL GRAVITATIONAL ENERGY and KINETIC ENERGY of the baseball at the moment of release from the thrower's hand.
Is Potential Energy=19.62J?and Kinetic energy=90J?
(B) Calculate the POTENTIAL and KINETIC ENERGY of the baseball at the moment of impact at the floor.
Is Potential Energy=0J? and Kinetic energy=109.62J?
I am not really sure about the answers. Please help check.
(A) Yes to both questions, assuming the zero for potential energy is taken as the ground elevation. Potential energy can be defined as zero anywhere. It is only the changes in P.E. that matter in the energy and motion quations
(B) Yes again. You seem to have a good grasp of the situation.
Respond to this Question
Similar Questions

Math
A baseball is thrown up in the air from a height of 3 feet with an initial velocity of 23 feet per second. When does the baseball hit the ground? 
physics
Your physical therapist throws a baseball to you at a certain speed and you catch it. To increase the difficulty, the therapist is going to throw you a medicine ball whose mass is ten times the mass of the baseball. You are given the … 
Physics ASAP PLEASE
A baseball is thrown at an angle of 40.0° above the horizontal. The horizontal component of the baseball’s initial velocity is 12.0 meters per second. What is the magnitude of the ball’s initial velocity? 
PHYSICS HELP PLEASE!
A baseball is thrown at an angle of 40.0° above the horizontal. The horizontal component of the baseball’s initial velocity is 12.0 meters per second. What is the magnitude of the ball’s initial velocity? 
Physics
A baseball is thrown with an initial velocity of 37 m/s at an angle of 26 degrees above horizontal, from the top of the building which is 72 meters high. A. What will be the horizontal and vertical components of this baseballs velocity? 
Physics
Hey, I'm studying for my physics class, and I'm not sure how to solve this problem. Can someone walk me through it please? 
Physics
A 1.5 tall student throws a baseball with a horizontal component of velocity of 25m/s. It takes 3.00s to come back to its original height. d. how far did the ball travel horizontally? 
physics
a ball of mass 0.1kg is thrown vertically upwards with an initial velocity of 80m/s.calculate the potential energy (I) half way up (ii) at its maximum height.what is the kinetic energy as it leaves the ground 
calculus
Use a(t) = 9.8 meters per second per second as the acceleration due to gravity. (Neglect air resistance.) A baseball is thrown upward from a height of 3 meters with an initial velocity of 7 meters per second. Determine its maximum … 
Calc
A baseball is thrown upwards from a height of 2 meters with an initial velocity of 10 meters per second. Use the fact that 9.8 meters per second squared is constant acceleration due to gravity to answer the following: The maximum …