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A body of mass 15 kg is moving with a velocity 10 m/s. A force is applied to it so that in 15 seconds, .it attains a velocity of 35 m/s. The magnitude of force applied is |
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Answer» ▪ Mass of body = 15kg▪ INITIAL VELOCITY = 10mps▪ Final velocity = 35mps▪ Time interval = 15sTo Find :▪ Magnitude of APPLIED force.CONCEPT :✏ This question is completely based on the concept of Newton's second law of motion.✏ As per this law, Force is defined as the RATE of change in momentum.☢ Applied force = Rate of change of linear momentumCalculation :→ F = dP/dt = ma → F = m × [(v - u) / t]→ F = 15 × [(35 - 10) / 15]→ F = 15 × [25/15]→ F = 25N |
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