Thursday

September 18, 2014

September 18, 2014

Posted by **Fred** on Sunday, December 24, 2006 at 6:54am.

Ok, assuming that, then you know the initial KEnergy; 1/2 .62 (5.5)^2 joules.

At the max height, the KE you are given is KE from horizontal motion. So subtract that amount (2.3J) from the initial KE, and you have then the KE that can go into vertical motion. From that, it is easy:

KE available for vertical motion=PE at top, where PEnergy at the top is mass*g*height and you solve for height.

In answering a question such as this one... you have the total PE = 7.1 J ..

Do you then divide this by mass 0.62 kg multiplied by 9.8 ms or by 9.8 squared ??? If it is 9.8 squared why is this so ????

Why does this mass have KE at top ??? should this not be 0 (zero) ???

Just a little confused...

Thanks

Fred

If you know the increase in PE, having derived if from the KE available from vertical motion, then divide PE by m*g to get the height increase. Joules divided by (kg m/s^2) equals meters

Thank you

**Answer this Question**

**Related Questions**

Motion equation - A stone, which weighs 0.62kg, is thrown, at 5.5ms, its kinetic...

algebra - An object is released into the air at an initial height of 6 feet and ...

Precal. - If object is thrown upward with an intitial velocity of 15 ft per ...

algebra - Patty is only 7 years old, but she insists she can play basketball ...

algebra - Patty is only 7 years old, but she insists she can play basketball ...

physics - A ball is thrown from the top of a building with an initial velocity ...

Biomechanics - A ball is thrown vertically upwards in the air at a velocity of ...

Math - The height(H) of an object that has been dropped or thrown in the air is ...

College algebra - When a ball is thrown up into the air, it makes the shape of a...

math - A soccer player kicks a ball and gives it an initial upward velocity of ...