Question

What is the work done by a machine called? In science. Q 2.Give reason: a.A bottle-opener is called a second class lever. b.A pulley is used to lift water from the well. c.A screw-driver is used to unscrew the rusted nuts. d.The steering of a car is called a wheel and axle. e.The ramp is used to lift a heavy load. f.The hill roads are built to have gradual slopes. Who will give the correct answer I will mark them as the brainliest.

Answer 1

Explanation:

The mechanical advantage of a machine is the amount that it magnifies (increases) a force to overcome a load. Nutcrackers have a mechanical advantage of about five. The force you use to squeeze the handles is magnified five times—making it strong enough to crack even the hardest nut.

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