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July 25, 2014

Homework Help: Physics

Posted by John on Tuesday, January 21, 2014 at 3:05pm.

The figure shows a 7 kg block being pulled along a frictionless floor by a cord that applies a force of constant magnitude 20 N but with an angle θ(t) that varies with time. When angle θ = 29, at what rate is the block's acceleration changing if (a)θ(t) = (3 10-2 deg/s)t and (b)θ(t) = (-3 10-2 deg/s)t ? (Hint: Switch to radians.)

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