Answer:
Newton believed that mass tells gravity how much force to exert. Einstein believed that mass tells space-time how to curve.
Explanation:
Isaac Newton believed that bodies on earth had a force of gravity pulling them down as a result of their masses.
Albert Einstein believed that the bodies were not pulled down but were moving around in a circular sphere/manner.
This confirms Newton believing that mass tells gravity how much force to exert and Einstein believing that mass tells space-time how to curve.
Look up pulleys problem through Khan academy and a video should pop up with a problem similar and you should be able to walk through it .
Answer:
A, C, D
Explanation:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.
and according to Newton's 4th law: An object that is at rest will stay at rest unless a force acts upon it. An object that is in motion will not change its velocity unless a force acts upon it.
Explanation:
Below is an attachment containing the solution.
Answer: the equilibrium point or center of mass is (4, 7.33)
Explanation:
1) Physicial principles:
- The equilibrium point is the center of mass.
- Call Xc and Yc the coordinates of the center of mass (Xc, Yc), then:
- Xc is given by the equation Xc = (m₁X₁ + m₂X₂) / (m₁ + m₂)
- Yx is given by the equation Yc = (m₁Y₁ + m₂Y₂) / (m₁ + m₂)
2) Data:
- m₁ = 24 kg
- X₁ = 2
- Y₁ = 5
- m₂ = 12 kg
- X₂ = 8
- Y₂ = 12
3) Solution:
- Xc = (m₁X₁ + m₂X₂) / (m₁ + m₂) = (24×2 + 12×8) / (24 + 12) = 4
- Yc = (m₁Y₁ + m₂Y₂) / (m₁ + m₂) = (24×5 + 12×12) / (24 + 12) = 7.33
Answer: the equilibrium point or center of mass is (4, 7.33)
