a 750kg motor car is moving at a constant force of 27m/s on a staight horizontal road. The frictional force expirience by the motor car travelling on the road is 680N. Calculate the power delivered by the motoq car
To calculate the power delivered by the motor car, we can use the formula:
Power = Force × Velocity
In this case, the force we are interested in is the net force acting on the car, which is the difference between the driving force and the frictional force.
Given:
Mass of the car (m) = 750 kg
Driving force (F_drive) = ?
Velocity (v) = 27 m/s
Frictional force (F_friction) = 680 N
First, calculate the net force acting on the car:
Net Force (F_net) = F_drive - F_friction
Since the car is moving with a constant velocity, we know that the net force is zero. Therefore:
F_net = 0
Now, let's rearrange the formula to solve for the driving force:
F_drive = F_friction
Plugging in the given value:
F_drive = 680 N
Now, we can calculate the power:
Power = Force × Velocity
Power = F_drive × v
Power = 680 N × 27 m/s
Power = 18,360 Nm/s
Therefore, the power delivered by the motor car is 18,360 Nm/s.