Center of Mass: Example by Jared Rovny, PhD

Name: Center of Mass: Example
Uploaded: 2016-12-15
Duration: 9 min 20 s
Description: The lecture Center of Mass: Example by Jared Rovny, PhD is from the course Force.

About the Lecture

The lecture Center of Mass: Example by Jared Rovny, PhD is from the course Force.

Included Quiz Questions

Which of the following statements is NOT correct about the center of mass?

The center of mass of a non-uniform spherical object is located at the center of the sphere.
A force applied to the center of mass of a system would make the system move without rotation.
The center of mass of an object can lie outside the object.
The acceleration caused by a uniform gravitational field on a system of masses is the same as if all the gravitational force was exerted on the center of mass of the system.
For uniform gravitational fields the center of mass and the center of gravity of an object are the same.

Mass m₁ = 4 kg is located at x₁ = 0 m and y₁ = 2 m and mass m₂ = 10 kg is located at x₂ = 5 m and y₂ = 8 m. What is the x and y coordinates of their center of mass?

x = 3.57 m , y = 6.29 m
x = 3.27 m , y = 6.31 m
x = 2.5 m , y = 5 m
x = 3.6 m , y = 6.2 m
x = 3.57 m , y = 5.71 m

A 59 kg woman and a 71 kg man sit on a seesaw which is 3.5 m long. What is the location of their center of mass?

1.59 m from the man
1.91 m from the man
1.59 m from the woman
In the middle of the seesaw, 1.75 m from the man
1.5 m from the man

A fisherman in a boat catches a great white shark with a harpoon. The shark struggles for a while and then becomes limp at a distance of 300 m from the boat. The fisherman pulls the shark by the rope attached to the harpoon. During this operation, the boat which was initially at rest, moves 45 m in the direction of the shark. The mass of the boat is 5,400 kg. What is the mass of the shark assuming that the water exerts no friction?