25/0.75 = 331/3 km per hourThat's the truck's average speed.If it spends the entire 45 minutes heading west, thenits average velocity is 331/3 km/hr west.
That would depend on their velocity (speed with direction), since the formula for momentum is momentum=Mass*Velocity. If they are moving at the same Velocity, the heavier of the two would have greater momentum.
For the instantaneous value of average velocity, average speed and average velocity are equal.
Velocity is speed and its direction. Average velocity is average speed and its direction.
Always.
The linear momentum of a truck would be greater than that of a bus if the truck has a larger mass or is moving at a higher velocity compared to the bus. Linear momentum is directly proportional to the mass and velocity of an object.
velocity is a vector and speed is scalar. Velocity has magnitude and directions, with magnitude being speed. The magnitude of average velocity and average speed is the same.
The speed of something in a given direction.
The momentum of a truck at rest is zero because momentum is the product of an object's mass and velocity. Since the truck is not moving, its velocity is zero, resulting in zero momentum.
Average velocity can be calculated by dividing the displacement (change in position) by the time interval. The formula for average velocity is average velocity = (final position - initial position) / time interval.
The average velocity over an time interval is the average of the instantaneous velocities for all instants over that period. Conversely, as the time interval is reduced, the average velocity comes closer and closer to the instantaneous velocity.
Velocity is speed and direction. Truck speed is 80 km/hr. Truck velocity is 80 km/hr going east. Its velocity is also -80 km/h going west, and 0 km/h going north or south.