It is impossible for a vehicle to ever move manually with a constant speed. Driving over a slight bump in the road is likely to jar the driver's foot, so changing the pressure the driver has on the accelerator. A sudden headwind in part of the journey will also alter the speed over a short distance.
It could move with a constant speed and not at constant velocity. Because the direction is ever changing. Speed is a scalar but velocity is a vector quantity which has direction aspect too.
An object will move at constant speed until acted upon by a force.
It depends on your setting. If the net force on an object is zero than the object will move with a constant speed. It will also move with a constant speed (but not velocity!) if a force forces the object to move in a circular motion.
when a body move with uniform speed
A car moves at a constant speed when the acceleration is zero. This means that neither the speed nor the direction of the car is changing. Once all external forces are balanced and there is no net force acting on the car, it will continue to move at a constant speed.
Positive velocity will move you 200 miles east in 4 hours traveling at a constant speed.
No, an object moving at a constant speed cannot be accelerating. Acceleration is defined as a change in velocity over time, so if the speed is constant, there is no change in velocity and therefore no acceleration.
Constant speed is movement at a fixed (constant) distance per unit of time. The same amount of distance is covered by the object in the same amount of time at each measurement of that same interval. An example of an object moving at a constant speed might be an object in orbit. Something up their above the drag of the atmosphere will move at a constant speed, and will continuously move around the earth at the same speed. Note that velocity is speed with a direction vector. An object in orbit will have a constant speed, but its velocity will be constantly changing because it is constantly changing the direction it is moving.
Constant speed is movement at a fixed (constant) distance per unit of time. The same amount of distance is covered by the object in the same amount of time at each measurement of that same interval. An example of an object moving at a constant speed might be an object in orbit. Something up their above the drag of the atmosphere will move at a constant speed, and will continuously move around the earth at the same speed. Note that velocity is speed with a direction vector. An object in orbit will have a constant speed, but its velocity will be constantly changing because it is constantly changing the direction it is moving.
If the forces acting on an object are balanced and the object is moving at a constant speed, the object will continue to move at that constant speed in a straight line. There will be no change in the object's velocity or direction of motion.
By Tractive Resistances I assume the total driving resistances including air resistance, rolling resistance etc.. In this to move the vehicle at a constant speed the driving force should be equal to tractive resistance. This means driving force at wheel is 280 N. Power = Force * Velocity 280 * 18 = 5040 W = 5.04 KW.
Light moves at a constant speed in a vacuum because of the properties of space and time, as described by the theory of relativity. According to this theory, the speed of light is a fundamental constant and does not change regardless of the observer's motion or the source of the light.