Saturday
August 30, 2014

Homework Help: physics

Posted by blah physics on Wednesday, May 22, 2013 at 9:50pm.

You are travelling in your 2000 kg car at 12.5 m/s and wish to accelerate to 17.3 m/s in 4.28 seconds, how much work, to the nearest joule, is required?

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4
In the previous problem what is the average power to the nearest watt?

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5
Assuming you have a bow that behaves like a spring with a spring constant of 150 N/m and you pull it to a draw of 51 cm, to the nearest joule how much work do you perform?

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6
In the previous problem, to the nearest tenth of a m/s, what is the speed of the 52 gram arrow when it is released?

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7
The green block is falling at a speed of 21 m/s and is 9 meters above the spring. The spring constant is 3840 N/m, to the nearest tenth of a cm how far is the spring compressed?

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8
In the previous problem to the nearest hundredth of a meter to what height will the block rise after it hits and leaves the spring?

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