how much energy is required to lift a 1400 kg car 1.8 metrs due to gravity?
The work needed to lift a 1400 kg car 1.8 meters is: W Force x Displacement x Cos Θ {where in this case Θ 0°} W mg x 1.8 x 1 W (1400)(9.81)(1.8) W ≈ 24,700 J {should be reported as 25,000 J due to only 2 sig. digits in height} ANS
Assuming this is happening on Earth you would use these simple equations: Force (energy) Mass times Acceleration of gravity and Energy Force times Distance So F 1400kg times 9.8 N/kg (then the kg cancels out and you have 13720 N of Force(Newtons) Energy 13720 N times 1.8 meters The answer is 24696 Nm or Newton Meters
