Why does a hollow sphere have more rotational kinetic energy?
Another hollow sphere of the same mass and radius is rotating about its axis through the center at the same rotation rate. Which sphere has a greater rotational kinetic energy? The hollow sphere, since the mass is distributed further away from the rotation axis.
Does a hollow or solid cylinder roll faster?
You should find that a solid object will always roll down the ramp faster than a hollow object of the same shape (sphere or cylinder)—regardless of their exact mass or diameter.
Why do hollow cylinders roll slower?
For a given mass, a hollow cylinder has more material away from the axis than a solid cylinder, so its moment of inertia is higher. This means that more of the potential energy is being turned into spinning the cylinder, so less is left over for the translational KE. It rolls more slowly down the slope.
Do heavier objects go downhill faster?
The force acting on the body that pulls the body down is the force of gravity. We know that for sure. Hence an object with greater mass feels greater force than the other one. So even if the slope is same for both objects, a massive object moves faster through the slope than a less mass object.
What are the laws of motion class 9?
Newton’s 1st law states that a body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force acts on it. If that velocity is zero, then the object remains at rest. And if an additional external force is applied, the velocity will change because of the force.
What is force short answer Class 9?
Force is a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object. It causes objects to accelerate. SI unit is Newton.
What is force of class 9th?
A force is an effort that changes the state of an object at rest or at motion. It can change an object’s direction and velocity. Force can also change the shape of an object.