Ten questions. The result tells you which lessons you may skip.
Which of these quantities is a scalar?
A vector \(\vec A\) of magnitude \(5\,\text{m}\) points east. The vector \(-2\vec A\) is
Two forces of \(3\,\text{N}\) and \(4\,\text{N}\) act at one point at \(90°\) to each other. Their resultant is
Two forces of \(8\,\text{N}\) and \(6\,\text{N}\) act at one point. Which value can their resultant never take?
A car turns from \(10\,\text{m/s}\) east to \(10\,\text{m/s}\) north. The magnitude of its change of velocity is
A string pulls with \(40\,\text{N}\) at \(60°\) to the vertical. Its vertical component is
The vector \(-3\hat i + 3\hat j\) makes an angle with the \(+x\) axis of
A force \(\vec F = (3\hat i + 4\hat j)\,\text{N}\) moves a particle through \(\vec d = (4\hat i - \hat j)\,\text{m}\). The work done is
What is \(\hat i\times\hat k\)?
Two bodies move at constant velocities. At their closest approach, the relative position and the relative velocity are