Can someone please help me with my Physics HW?

Posted on 2015-11-19 07:08:00 in Chemistry by STALLIN

Can someon please help me with my physics hw?

1. To find the height of a cliff, a physics student 45 meters away from it used a laser sight on the ground to find the angle up to the top of the cliff from that distance. If the angle was 66 degrees up from the horizontal, what is the height of the cliff?

2. What is the ground speed of a bird that flies 20.51 km/hr west, in a steady wind from the west at 78.8 km/hr?

3. What is the ground speed of a plane that flies 527 km/hr south, in a steady wind from the west at 92.4 km/hr?

4. To find the horizontal distance to a floating balloon that was 1.2 meters up in the air, a physics student sighted the angle up to the balloon. If the angle was 77 degrees up from the horizontal, how far would the student have to walk to get directly beneath the balloon?

5. What is the ground speed of a bird that flies 76.19 km/hr east, in a steady wind from the west at 92.4 km/hr?

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