Explain the law of motion needed to solve this problem and then solve it. On Planet Zorg a 30 kg barbell can be lifted by only exerting a force of 180 N. What is the acceleration of gravity on Planet Zorg? Predict how the motion of this object would change if on Earth.
Is it the 2nd law of motion I don't understand how to find the motion would be on earth or on Zorg for that matter.
From Newton's second law (F=ma):
a = F/m = 189 N/30 kg = 6.0 m/s2
acceleration=force/mass use it u ll get acceleration on the planet
But does it change for Earth? Ok so I get that but do I change it for earth?
yes
To solve this problem, we need to apply Newton's second law of motion, which states that the force acting on an object is equal to its mass multiplied by its acceleration. The formula for Newton's second law is:
F = m * a
where F represents the force, m represents the mass of the object, and a represents the acceleration.
In this case, we are given the mass of the barbell on Planet Zorg as 30 kg and the force required to lift it as 180 N. We need to find the acceleration and use it to determine the acceleration due to gravity on Planet Zorg.
First, we rearrange the formula to solve for acceleration:
a = F / m
Substituting the given values, we get:
a = 180 N / 30 kg
a = 6 m/s^2
Therefore, the acceleration of gravity on Planet Zorg is 6 m/s^2.
Now, let's consider how the motion of this object would change if it was on Earth. On Earth, the acceleration due to gravity is approximately 9.8 m/s^2. Since the acceleration due to gravity on Planet Zorg is lower (6 m/s^2), the object would feel lighter and gravitational forces would be weaker. If the same amount of force is exerted (180 N), the object would experience a greater acceleration on Planet Zorg compared to Earth. This means the object would feel lighter and be easier to lift on Planet Zorg compared to Earth.