The velocity of a moving train can be calculated by dividing the distance traveled by the time it takes to travel that distance. This is represented by the formula: velocity = distance / time.
Speed is a measure of how fast an object is moving, while velocity is a measure of both the speed and direction of motion. In a moving train, speed would be the rate at which the train is traveling, while velocity would also take into account the direction in which the train is moving.
The mass of a train does not directly affect its acceleration. According to Newton's Second Law of Motion, the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass. So, a heavier train would require a greater force to achieve the same acceleration as a lighter train.
Yes, a train can have a negative acceleration, also known as deceleration or slowing down. This happens when the train is moving in the opposite direction of the net force acting on it, causing it to slow down. An example of this would be when a train is approaching a stop and the brakes are applied.
Friction can have a significant impact on the motion of a train. Friction between the train's wheels and the track can slow down the train and decrease its acceleration, while friction between the train's wheels and the air can also affect its speed. In order to maintain a constant velocity, the train's engine must work against these frictional forces.