0 a.
a
Two forces 300 N at 0°and 400 N at 90° pull on an object.
Draw a sketch showing the vector sum of two forces.
b. Find magnitude of the resultant force.
c. Find direction of resultant force.

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.