10. A boy can raise a rock that weighs 95 N by using a lever and applying a force of 15 N. what is the mechanical advantages of
2 answers:
10. To know the mechanical advantage, we just need to find the ratio of the force produced by the machine (also known as the weight of the object it's trying to move) to the force applied to the machine.
Simply put, we need to use the following formula:
ANSWER: The mechanical advantage of the lever is 6.33
11. ANSWER: The wheel-and-axle principle. The wheel and axle is a kind of simple machine that has been used to greatly increase the mechanical advantage in complex machines. Its principle can also be applied to ramps, where the work is made easier as compared to lifting objects since a ramp would require you to exert less force.
Recalling the formula for the mechanical advantage in the previous item, a lesser force applied to the machine would mean that there would be a greater mechanical advantage.
Simply put, we need to use the following formula:
ANSWER: The mechanical advantage of the lever is 6.33
11. ANSWER: The wheel-and-axle principle. The wheel and axle is a kind of simple machine that has been used to greatly increase the mechanical advantage in complex machines. Its principle can also be applied to ramps, where the work is made easier as compared to lifting objects since a ramp would require you to exert less force.
Recalling the formula for the mechanical advantage in the previous item, a lesser force applied to the machine would mean that there would be a greater mechanical advantage.
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<h2>Greetings!</h2>
Firstly, to find speed you need to remember the speed formula:
Speed = Distance ÷ Time
You can do it by doing 2800 ÷ 2 but that gives m/h (metres per hour)
So to convert hours into seconds, you multiply 2 by 7200 (amount of second in 2 hours:
2 * 7200 = 14400 seconds
Now we can do distance ÷ time by plugging the values in:
2800 ÷ 14400 = ≈0.194