Thursday

November 27, 2014

November 27, 2014

Posted by **Anonymous** on Tuesday, February 19, 2008 at 7:22pm.

Also..

A stone is thrown vertically upward at a speed of 40m/s. How long does it take to reach a height of 90m?

I ended up with a quadratic of t^2-8t+18 which cannot be factored...So is the answer that the stone doesn't reach a height of 90m?

Another question...

A hockey player shoots a puck from his own end of the ice with an initial speed of 10 m/s. The ice surface is 60 m long and produces a deceleration of 1.0m/s^2 on the sliding puck.

a) Will the puck travel the length of the ice?

b) With what speed will it reach the far end of the ice OR how far from the end of the ice will it come to rest?

I think I used the wrong equation.

I used V2^2 = V1^2 + 2ad

And solved for distance to get 50 m which indicates that the puck didn't travel the length of the ice. But I have a feeling I did it wrong since I'm also supposed to use a kinematic equation for the second question rather than just subtraction.

Thanks!

**Answer this Question**

**Related Questions**

Physics - Under what conditions can a quadratic function be a perfect square? ...

Physics - What do I have wrong in here? A stone is thrown vertically upward at a...

physics - a girl throws a stone vertically upward with an initial speed of 8 m/s...

Physics - Two stones are thrown vertically upward from the ground, one with ...

physics - a stone is thrown straight upward and rises to a maximum vertical ...

science - Two stones are thrown vertically upward from the ground, one with ...

physics - A stone with mass m = 2.3 kg is thrown vertically upward into the air ...

physics - A stone is thrown vertically upward with a speed of 15m/s.what is the ...

PHYSICS - A stone is thrown in a vertically upward direction with a velocity of ...

physics - A ball is thrown vertically upward with an initial speed of 20 m/s. ...