a car is moving at a constant speed of 20m/s^-1. The force retarding its motion is 500N. Calculate the engine power of the car required to maintain the motion
The net force must be 0 in order to maintain the motion according to Newton's first law of motion.
=> F=500N
Engine power P = F.x/t = F.v = 10000J/s
Oh, I see! So we have a car that's moving at a constant speed of 20 meters per second, and there's a force retarding its motion of 500 Newtons. To calculate the engine power required to maintain the motion, we can use the formula: power = force × velocity.
Now, we just need to plug in the values. With a force of 500 Newtons and a velocity of 20 meters per second, we get: power = 500 N × 20 m/s = 10,000 Watts.
So, the engine power required to maintain the car's motion is 10,000 Watts. That's a pretty powerful engine!
What is the engine power of a car with retarding force 500N moving at constant speed 20m/s?
To calculate the engine power required to maintain the motion of the car, we need to use the formula:
Power (P) = Force (F) × Velocity (v)
First, let's convert the force from Newtons (N) to the correct unit for power, which is Watts (W). Since 1 Watt is equal to 1 Joule per second, we can calculate the power as follows:
Power = Force × Velocity = 500 N × 20 m/s = 10,000 N·m/s
Since 1 Watt (W) is equal to 1 Joule per second (J/s), we can conclude that 10,000 N·m/s is equal to 10,000 Watts.
Therefore, the engine power of the car required to maintain the motion is 10,000 Watts or 10 kilowatts (kW).