Is any work being done on a car moving with a constant velocity along a perfectly straight perfectly smooth and horizontal road?
According to work energy theorem, the work done by the car is zero. Since the kinetic energy does not change and the car is moving along a straight horizontal road the work done is zero only if there is no non conservative force like friction. If there is friction then work done will be force into displacement.
What is the net work done by the external force on the car moving with a constant speed on a straight line?
No, when a car is moving with constant speed on a straight road net-work done by external forces will be zero. Q. Solve the following problems.
What motion is a car moving in a straight line?
A car moving on a straight road is an example of rectilinear motion.
When a car is moving with a constant speed on a straight line?
Answer and Explanation: The forces acting on the car all cancel each other from Newton’s First Law of motion. Constant speed along a straight line is equivalent to constant velocity hence zero acceleration.
What kind of motion when a car moving with constant speed turning around a curve?
The type of motion that a car exerts while moving with a constant speed and turning around a curve is uniform circular motion and the electron orbitting the nucleus exerts the same kind of motion.
Is a car moving around a bend at constant speed?
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.
What is the net work done on a car Travelling horizontally at a constant speed?
At constant velocity, there is no change in kinetic energy, so the net work done to move the car is zero. Therefore the power supplied by the engine to move the car equals the power expended against gravity and air resistance.
What is the net work done to the car if it moves at a constant speed Why?
Per the work energy theorem the net work done on an object equals its change in kinetic energy. Therefore the net work on an object moving at constant velocity is zero.
What is the net force of a car driving around a curve?
The net force on a car traveling around a curve is the centripetal force, Fc = m v2 / r, directed toward the center of the curve. For a level curve, the centripetal force will be supplied by the friction force between the tires and roadway.
Which is the SI unit of speed?
The SI unit of speed is the meter per second, abbreviated as m/s or ms-1.
Which is Newton’s 1st law of motion?
Newton’s First Law of Motion (Inertia) An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
What is a negative acceleration also called?
Negative acceleration is also known as retardation.
Can there be any forces acting on a car moving in a straight line with constant speed?
A car moving at a constant speed (uniform motion) has all forces acting on it balanced. In this case, the two backward forces (air resistance and friction) perfectly balance the applied force of the wheels on the road in the opposite direction.
Is there work done if velocity is constant?
If a body is moving with a constant velocity, the net force on it is zero. So the net work done on it will be zero.
When a car moves along a horizontal road with constant velocity?
A car moves along a horizontal road with constant velocity v0 = v0xi until it encounters a smooth inclined hill, which it climbs with constant velocity v1 = v1xi + v1yj as indicated in the figure. The period of time during which the car changes its velocity is Δt.
Does the engine of a car moving in horizontal road in uniform speed do any work?
Force applied by the engine of the car against friction maintains its uniform velocity . This force is doing work as displacement occurs against frication. If f= force of friction and v=velocity of the car, work done in 1s by the engine = force of friction × constant velocity =fv.