Posted by **y912f** on Sunday, February 15, 2009 at 2:10pm.

please tell me if these are correct

A track star in the long jump goes into the jump at 12 m/s and launches herself at 20.0 deg above the horizontal. What is teh magnitude of her horizontal displacement?

(Assume no air resistance and that Ay= -g = -9.81 m/s^2)

i got 9.2 m

There are 6 books in a stack, and each book weighs 5 N. The coefficient of static friction between teh books is 0.2. With what horizontal force must one push to start sliding the top 5 books off the bottom one?

i got 3N

A rock is thrown straight upward with an initial velocity of 9.6 m/s in a location where the acceleration due to gravity has a magnitude of 9.81 m/s^2. To what height does it rise?

i got 4.7

can you please show me how to solve for this last one

thanks

## Answer this Question

## Related Questions

- physics - please show me how to do this in steps. A track star in the long jump ...
- Physics - A track star in the long jump goes into the jump at 12 m/s and ...
- Physics - A track star in the long jump goes into the jump at 12 m/s and ...
- Physics - A trackstar in the long jump goes into the jump at 12 meters per ...
- physics - A track star goes in the long jump at 10 m/s at 37 degrees above the ...
- physics - A ski jumper launches from a ski jump that is oriented parallel to a ...
- science - A ski jumper launches from a ski jump that is oriented parallel to a ...
- physics - A girl makes a jump in the long jump with an initial velocity of 12 m/...
- physics - A girl makes a jump in the long jump with an initial velocity of 12 m/...
- 5th Grade Math - Jason and Doug competed in the long jump at a track meet. Jason...

More Related Questions