The car drives evenly along a horizontal road at a speed of 10 m / s. What work does the car engine

| December 16, 2020 | education

The car drives evenly along a horizontal road at a speed of 10 m / s. What work does the car engine do in 1 hour if the resistance to movement is 500 N?

What we can immediately understand is that the force of the car (Fa) is greater than or equal to the resistance force of movement.
And the second thing that will lead us to the correct answer is Newton’s first law says:
“There are such inertial frames of reference, relative to which the body, if other forces do not act on it (or the action of other forces is compensated), is at rest or moves uniformly and rectilinearly.”
Since the body moved evenly, it means that the action of the engine is 500 N. It remains only to find a path and substitute the values
S = 36 * 1 = 36 (km) 36km / h = 10m / s
A = 36 * 500 = 18,000 (J)
Answer: A = 18,000 (J)



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