What principle explains why lifting heavy objects is easier using ramps?
2 answers:
The work involved in lifting the heavy object can be describes as:
Work required to lift the object to the same height is independent of the path by which it is taken there.The machines such as ramps do not decrease the work. These help in making our work easier. Due to ramp, we have to push to a longer distance but less effort i.e. less force is required to do the same amount of work.
The force to be exerted in absence of inclined plane is mg ( weight of the object). On the other hand, the force exerted on an inclined plane is reduced by sinθ (F=mg sinθ) value of sinθ lies between 0 and 1.
Hence, it becomes easier to lift a heavy object using ramp.
You might be interested in
Answer:
a) Energy density of the magnetic field, u = 183.46 J/m³
b) Total energy, E = 0.167 J
Explanation:
a) Number of turns in the solenoid, N = 1410
Area, A = 13.8 cm² = 0.00138 m²
Current, I = 8.01 A
Length of the solenoid, l = 66.1 cm = 0.661 m
Energy density, u is given by the formula
Where B is the magnetic field
The magnetic field in a solenoid is given by the formula,
T
b) The total energy = Energy density * Volume
E = u V
Volume = Area * Length
V = Al = 0.00138 * 0.661
V = 0.00091218 m³
E = 183.46 * 0.00091218
E = 0.167 J