Acar is moving northeast at a velocity of 10 meters per second. four
seconds later it's going 30 meters per second. what was the car's average
acceleration during this time?
a) 5 m/s
b) 5 m/s²
c) 5 m/s² northeast
d) 20 m/s² northeast

The average acceleration of car during this time is 5 Northeast.

Option C

Explanation:

The acceleration exerted by an object is the rate of change in velocity the object undergoes with respect to time. Average acceleration is the measure of variation in acceleration in a given interval of time.

Here, final velocity is 30 m/s and initial velocity is 10 m/s. The final velocity is attained by the car after 4 s. Thus, the average acceleration will be

So, the average acceleration is 5 and as the car was moving in the northeast direction, the average acceleration will also be exerting in the northeast direction only.

so easy. just google the electromagnetic waves and it’ll pop up.