Calculating Speed and Height of a Thrown Ball

[12boone]

Homework Statement

A 0.20KG ball is thrown with a speed of 13 m/s at an angle of 32 degrees.

What is the speed at the highest point?

How high does it go? (Use conservation of energy, and ignores air resistance

Homework Equations

I think the kinematic equations but I am not sure.

The Attempt at a Solution

I was positive that the velocity of any projectile at the highest point would be zero, but this was not right in this problem. I think the problem has something to do with mechanical energy but I am not sure. Any suggestions for A? so that I can maybe find B.

 

[Hootenanny]

Homework Statement

A 0.20KG ball is thrown with a speed of 13 m/s at an angle of 32 degrees.

What is the speed at the highest point?

How high does it go? (Use conservation of energy, and ignores air resistance

Homework Equations

I think the kinematic equations but I am not sure.

The Attempt at a Solution

I was positive that the velocity of any projectile at the highest point would be zero, but this was not right in this problem. I think the problem has something to do with mechanical energy but I am not sure. Any suggestions for A? so that I can maybe find B.

You're almost correct: the vertical component of the velocity will be zero at the highest point, but the horizontal component needn't be.

 

[Pyrrhus]

Homework Statement

A 0.20KG ball is thrown with a speed of 13 m/s at an angle of 32 degrees.

What is the speed at the highest point?

How high does it go? (Use conservation of energy, and ignores air resistance

The Attempt at a Solution

I was positive that the velocity of any projectile at the highest point would be zero, but this was not right in this problem. I think the problem has something to do with mechanical energy but I am not sure. Any suggestions for A? so that I can maybe find B.

In projectile motion at the highest point one of the components speed will be zero, but remember one of components will have constant value. Projectile motion is a mix of free fall and constant velocity movements.