Ten questions. The result tells you which lessons you may skip.
A bob on a string goes round a vertical circle. When the string is horizontal, the tension equals
A bob on a string \(1\,\text{m}\) long moves at \(6\,\text{m/s}\) at the lowest point. Take \(g = 10\,\text{m/s}^2\). Its speed when the string is horizontal is
A \(0.5\,\text{kg}\) bob on a string \(1\,\text{m}\) long moves at \(6\,\text{m/s}\) at the lowest point. Take \(g = 10\,\text{m/s}^2\). The tension there is
A stone on a string \(2.5\,\text{m}\) long moves in a vertical circle. Take \(g = 10\,\text{m/s}^2\). The least speed it needs at the top is
A bob goes all the way round a vertical circle on a string. The tension at the bottom exceeds the tension at the top by
A small block slides without friction down a ramp into a loop of radius \(2\,\text{m}\). The least starting height above the bottom of the loop is
A bob on a string of length \(r\) is launched from the lowest point with \(u^2 = gr\). It
A bob on a string of length \(r\) is launched from the lowest point with \(u^2 = 3gr\). The string goes slack at a height above the lowest point of
A ball fixed to a light rod \(0.9\,\text{m}\) long must go all the way round a vertical circle. Take \(g = 10\,\text{m/s}^2\). The least speed at the lowest point is
A small block is nudged from the top of a smooth sphere. It leaves the surface where the angle \(\varphi\) from the top satisfies