A car of 1500 kg mass moving with constant speed 10m/s for 10s . Calculate the average force acting on the car during this time
v=const => net force =0
To calculate the average force acting on the car, we can use Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration.
In this case, since the car is moving with a constant speed, its acceleration is zero. Therefore, the net force acting on the car is also zero (as there are no external forces acting on it).
However, we can still calculate the average force by using the formula:
Average force = change in momentum / change in time
The momentum of an object is equal to the product of its mass and velocity. So, the initial momentum is given by:
Initial momentum = mass × initial velocity
Final momentum is given by:
Final momentum = mass × final velocity
Since the car is moving at a constant velocity, its initial and final velocities are the same. Therefore, the change in momentum is:
Change in momentum = Final momentum - Initial momentum
= (mass × final velocity) - (mass × initial velocity)
= mass × (final velocity - initial velocity)
Substituting the given values:
Change in momentum = 1500 kg × (10 m/s - 10 m/s)
= 0 Ns
Since there is no change in momentum, the average force acting on the car is zero.