Ten questions. The result tells you which lessons you may skip.
A body's acceleration points exactly along its velocity. Its path is
At one instant a body's acceleration makes an angle of \(120°\) with its velocity. At that instant the body is
A body's acceleration stays at right angles to its velocity and keeps the same size. Its path is
One radian is about
A finite angular displacement is not treated as a vector because
A wheel turns at \(600\,\text{rpm}\). Its angular velocity is about
Two points on a turning disc are at \(5\,\text{cm}\) and \(10\,\text{cm}\) from the axis. Compared with the inner point, the outer point has
In uniform circular motion,
A stone goes round a circle of radius \(0.5\,\text{m}\) at a steady \(4\,\text{rad/s}\). Its centripetal acceleration is
A wheel starts from rest with a constant angular acceleration. At the first instant, the acceleration of a point on its rim points
A particle on a circle about the origin is at \(\vec r = 3\hat i\,\text{m}\), with \(\vec\omega = 2\hat k\,\text{rad/s}\). Its velocity is
A disc turning at \(10\,\text{rad/s}\) slows at a steady \(2\,\text{rad/s}^2\). Through what angle does it turn before it stops?
The area under the \(\omega\)-\(t\) graph of a turning wheel gives
A ball is launched at \(20\,\text{m/s}\) at \(60°\) above the horizontal, with \(g = 10\,\text{m/s}^2\). The radius of curvature of its path at the highest point is
A particle moves at \(6\,\text{m/s}\) along a straight line that passes \(3\,\text{m}\) from a point O. When it is closest to O, its angular velocity about O is