The force generated from the engine of a car is found to be 450 N. Calculate the force developed whe

JAMB Physics 2023 49 views

The force generated from the engine of a car is found to be 450 N. Calculate the force developed when the car moves with a constant speed of 12 ms⁻¹.

  1. 5.7 kW
  2. 4.5 kW
  3. 1.2 kW
  4. 5.4 kW ✓

Explanation

Step 1: Identify given values and what to find
Given: F = 450 N, v = 12 ms⁻¹
Find: Power P

Step 2: Write the power formula
Formula: P = Fv

Step 3: Substitute and calculate
P = 450 × 12 = 5400 W = 5.4 kW

Step 4: The answer is 5.4 kW

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