physics
posted by Anonymous .
A car is driven 145 km west and then 65 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?

Add the two vectors.
Net displacement west is 145 + 65 cos45
Net displacement south is 65 sin45 
That did not work...

You must not have done the vector addition correctly. If you show your work, the error can probably be found.
You will need to use the Pythagorean relation for the magnitude.
The sin and cos of 45 degrees are both 0.707 
A car is driven 115 km west and then 85 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?

a car travels 80 km due north and then 140 km in the direction west of north. find the magnitude and direction of the cars resultant displacementby drawing an accurate scale diagram.