Originally Posted by

**tom555** hi, i have some questions that i need help with i wondered if anyone could post the answers, here are the questions

1. The distance moved by a car is given by the equation s=3tsquared-5t+2 using differentiation find an equation for the gradient of the tangent to the curve when the time is 2 seconds ie differentiate and evaluate.

2. The velocity of a vibrating system can be modelled by the equation: v=5 sin 3t determine the equation for the rate of change of displacement with time (acceleration).