PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
Starting from a campsite O, a hiker walks 1.5 km due north in 20 min to reach point P on a river-bank, then follows the river 2.0 km due east in 30 min to point Q, and finally walks 1.5 km due south in 25 min to reach point R.
(i) Calculate the total distance travelled in reaching R from O.
(ii) Determine the magnitude and direction of the displacement OR.
(iii) Find the average speed for the entire journey from O to R.
(iv) Compute the magnitude of the average velocity for the journey and specify its direction with respect to the east.