A current of 2m A flows through a conductor of resistance 2 kΩ. Calculate the voltage across the conductor.
A current of 2m A flows through a conductor of resistance 2 kΩ. Calculate the voltage across the conductor.
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The radius of the effort piston of a hydraulic lift is 1.4 cm while that of the load piston is 7.0 cm. This machine is used to raise a load of 120 kg at a constant velocity through a height of 2.5 cm. given that the machine is 80% efficient, calculate; a) The effort needed b) The energy wasted using the machine
The radius of the effort piston of a hydraulic lift is 1.4 cm while that of the load piston is 7.0 cm.
This machine is used to raise a load of 120 kg at a constant velocity through a height of 2.5 cm. given that the machine is 80% efficient, calculate;
a) The effort needed
b) The energy wasted using the machine
A car weighing 1,600 kg is lifted with a jack-screw of 11 mm pitch. If the handleis 28 cm from the screw, find the force applied.
A car weighing 1,600 kg is lifted with a jack-screw of 11 mm pitch. If the handleis 28 cm from the screw, find the force applied.
A man uses an inclined plane to lift a 50 kg load through a vertical height of 4.0 m. the inclined plane makes an angle of 300 with the horizontal. If the efficiency of the inclined plane is 72%, calculate; a) The effort needed to move the load up the inclined plane at a constant velocity. b) The work done against friction in raising the load through the height of 4.0 m. (take g= 10 N/kg)
A man uses an inclined plane to lift a 50 kg load through a vertical height of 4.0 m.
the inclined plane makes an angle of 300 with the horizontal.
If the efficiency of the inclined plane is 72%, calculate;
a) The effort needed to move the load up the inclined plane at a constant velocity.
b) The work done against friction in raising the load through the height of 4.0 m. (take g= 10 N/kg)
A wheel and axle is used to raise a load of 280 N by a force of 40 N applied to the rim of the wheel. If the radii of the wheel and axle are 70 cm and 5 cm respectively. Calculate the M.A, V.Rand efficiency.
A wheel and axle is used to raise a load of 280 N by a force of 40 N applied to the rim of the wheel. If the radii of the wheel and axle are 70 cm and 5 cm respectively. Calculate the M.A, V.Rand efficiency.
A block and tackle system has 3 pulleys in the upper fixed block and two in the lower moveable block. What load can be lifted by an effort of 200 N if the efficiency of the machine is 60%?
A block and tackle system has 3 pulleys in the upper fixed block and two in the lower moveable block. What load can be lifted by an effort of 200 N if the efficiency of the machine is 60%?
A machine; the load moves 2 m when the effort moves 8 m. If an effort of 20 N is used to raise a load of 60 N, what is the efficiency of the machine?
A machine; the load moves 2 m when the effort moves 8 m. If an effort of 20 N is used to raise a load of 60 N, what is the efficiency of the machine?
A box of mass 500 kg is dragged along a level ground at a speed of 12 m/s. If the force of friction between the box and floor is 1200 N. Calculate the power developed.
A box of mass 500 kg is dragged along a level ground at a speed of 12 m/s. If the force of friction between the box and floor is 1200 N. Calculate the power developed.
A person weighing 500 N takes 4 seconds to climb upstairs to a height of 3.0 m. what is the average power in climbing up the height?
A person weighing 500 N takes 4 seconds to climb upstairs to a height of 3.0 m. what is the average power in climbing up the height?
A spring constant k = 100 Nm is stretched to a distance of 20 cm. calculate the work done by the spring.
A spring constant k = 100 Nm is stretched to a distance of 20 cm. calculate the work done by the spring.
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