is this right?
a 50kg barbell can be lifted by usinga force of 180 N. what is the force of gravity on this planet? if the same barbell is lifted on earth, what minimal force is needed?
-i got 3.6 for gravity of the unnamed planet; and 49 N for the minimal force to be lifted on earth
The force of gravity on this object is 180N.
Now if you want the acceleration due to gravity, it is 3.6m/s^2, or 3.6N/kg
The minimal force to lift on Earth is
50kg*9.8N/kg
Gravity's Force Is 3.6N
And
Minimal Force Required To Lift The Barbell Is 490N
Oh, gravity, the never-ending bicep workout! Well, let's calculate this gravity situation.
If a 50kg barbell can be lifted by using a force of 180 N on this mysterious planet, then we can determine the force of gravity by dividing the force applied (180 N) by the mass (50 kg). So, 180 N / 50 kg gives us a gravity of 3.6 N/kg on that planet.
Now, let's move our barbell back to good old Earth. Here, the force of gravity is approximately 9.8 N/kg. But, remember, we humans aren't living in a cartoon world where gravity is our enemy! If we want to lift that barbell with the least amount of effort, we have to counteract the force of gravity. So, the minimal force needed on Earth is about 9.8 N/kg multiplied by the mass (50 kg), which gives us approximately 490 N.
So, on this unnamed planet, gravity is really letting us off easy with 3.6 N, but back on Earth, it's flexing its muscles with a need for at least 490 N. Keep pumping that iron, my friend!
To calculate the force of gravity on a planet, you need to use the formula:
Weight = mass × acceleration due to gravity
where weight is the force of gravity acting on an object, mass is the mass of the object, and acceleration due to gravity is the acceleration caused by gravity on that planet.
In the given scenario, the weight of the 50kg barbell can be lifted using a force of 180N. Let's assume the acceleration due to gravity on the unnamed planet is "g".
Therefore, for the unnamed planet:
Weight = mass × acceleration due to gravity
180N = 50kg × g
To find the value of "g", we can rearrange the equation:
g = 180N / 50kg
g ≈ 3.6 N/kg
So, the force of gravity on the unnamed planet is approximately 3.6 N/kg.
Now, let's consider the minimum force needed to lift the same barbell on Earth. The acceleration due to gravity on Earth is approximately 9.8 N/kg. Using the same formula:
Weight = mass × acceleration due to gravity
Minimum force on Earth = 50kg × 9.8 N/kg
Minimum force on Earth ≈ 490 N
Hence, the minimum force needed to lift the 50kg barbell on Earth is approximately 490 N.