1. A car is driving at 20 km/hr west. Later the same car is seen driving at 30 km/hr north. Whatis the direction of the average acceleration of the car

To determine the direction of the average acceleration of the car, we need to consider the change in velocity.

First, let's convert the velocities to a common unit. Since the car is initially moving west at 20 km/hr and later moving north at 30 km/hr, we can convert these velocities to meters per second (m/s) for consistency.

1 km/hr is equal to 0.2778 m/s. Therefore, the initial velocity of the car is 20 km/hr * 0.2778 m/s = 5.556 m/s west, and the final velocity is 30 km/hr * 0.2778 m/s = 8.333 m/s north.

Next, we can calculate the change in velocity by subtracting the initial velocity from the final velocity. The change in velocity is (8.333 m/s north) - (5.556 m/s west) = 2.777 m/s north.

Finally, we can determine the direction of the average acceleration by considering the change in velocity. Since the change in velocity is in the north direction, the average acceleration of the car is also in the north direction.