EVERYDAY SCIENCE

Detailed explanation-1: -Because the velocity is changing, the car is accelerating, despite the magnitude of the velocity remaining the same. The answer is B, a car that rounds a curve at a constant speed.

Detailed explanation-2: -When a car moves around a curve, even if the speed is constant the velocity of the car changes as velocity is the vector quantity and speed is a scalar quantity. The acceleration of the car also changes as it is dependent on the velocity of the car.

Detailed explanation-3: -When a car round a corner at a constant speed, the direction of the car changes. For there to be a non-zero acceleration, the speed and/or the direction have to change. In the case of a car rounding a corner, the direction changes.

Detailed explanation-4: -Uniform Circular Motion: In the uniform circular motion, the object revolves around a fixed axis of rotation, and the speed of the object remains constant, but at every instant, the direction of the object keeps on changing, which will accelerate the object.

Detailed explanation-5: -Acceleration is a change in velocity, either in its magnitude-i.e., speed-or in its direction, or both. In uniform circular motion, the direction of the velocity changes constantly, so there is always an associated acceleration, even though the speed might be constant.