A car whose mass is 1000 kg is traveling at a constant speed of 10 m/s Neglecting any friction, how much force will the engine have to supply to keep going the same speed?
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By what criteria might you determine whether a question might be answered using the scientific method?
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To calculate the force required to keep the car traveling at a constant speed, we need to use Newton's second law of motion, which states that force is equal to mass multiplied by acceleration.
In this case, there is no acceleration since the car is traveling at a constant speed. So, the net force acting on the car is zero. Hence, the force supplied by the engine needs to counterbalance the force of any opposing factors (such as friction) to maintain the constant speed.
Therefore, if we neglect any friction, the force required to keep the car going the same speed is zero.