CabalGroupie said:
The kinetic energy of the car is directly proportional to its mass and the square of its velocity. This means that as the car slows down, its kinetic energy decreases.
The magnitude of the car's change in velocity is 14 km/h and its direction is east, as indicated by the [E] in the given information.
According to the law of conservation of momentum, the total momentum of a closed system remains constant. In this scenario, the car's initial momentum and final momentum must be equal, despite the change in velocity.
The work done on an object is equal to the force applied to it multiplied by the distance it moves in the direction of the force. Without knowing the force applied, it is impossible to determine the exact amount of work done on the car.
Acceleration is the rate of change of velocity. In this scenario, the car is decelerating, or slowing down, so its acceleration is negative and decreasing in magnitude.