17. ssm A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.870 m/s at an angle of 35.0° above the table, and it lands on the magazine 0.0770 s after leaving the table. Ignore air resistance. How thick is the magazine? Express your answer in millimeters.

 

We know

 

From this we can find the horizontal and vertical initial velocities from

 

and

We can find height by

The acceleration in the y direction will be g.  Since initial velocity is up but g acts down, we need to put a – sign in as follows

 

 

 

 

 

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This page last updated on January 11, 2020