This true it will be visible if they are covered
Answer:
Explanation:
When objects collide, energy can be transferred from one object to another, thereby changing their motion. In such collisions, some energy is typically also transferred to the surrounding air; as a result, the air gets heated and sound is produced.
Given that the equation of distance "x" of a car travelling in a straight line along a road.
x(t) = 9 t² - 8 t³ meters
acceleration at time "t" = ?
t = 4.6 s
Acceleration = Velocity/ time
Velocity = distance/ time
Acceleration = distance / time²
Acceleration = x / t²
a (t) = (9t² - 8t³)/ t²
a (t) = 9 - 8t
a (4.6) = 9 - 8 (4.6)
a (4.6) = -27.80 m/s²
The acceleration of car at time "t" is 27.80 m/s².
Well, to be technically precise about it, none of the choices is a correct answer.
Two hours after starting out, the car is 200 km south of where it started.
Its displacement is 200 km south.
Its average velocity is (200 km south) / (2 hours)
Velocity = 100 km/hour South
None of the choices has the correct units, and none has a direction. So none of the choices can even be a 'velocity'.