1. An ostrich cannot fly, but it is able to run fast. Suppose an ostrich runs east for 7.95s and then runs 161m south, so that the magnitude of the ostrich's resultant displacement is 226m. Calculate the magnitude of the ostrich's eastward component and it's running speed.
2. A killer whale can swim as fast as 15m/s. Suppose a killer whale swims in one direction at this speed for 8.0s, makes a 90degree turn, and continues swimming in the new direction with the same speed as before. After a certain time interval, the magnitude of the resultant displacement is 180.0m. Calculate the amount of time the whale swims after changing direction.
2. A killer whale can swim as fast as 15m/s. Suppose a killer whale swims in one direction at this speed for 8.0s, makes a 90degree turn, and continues swimming in the new direction with the same speed as before. After a certain time interval, the magnitude of the resultant displacement is 180.0m. Calculate the amount of time the whale swims after changing direction.