Answer:
The ball has an initial linear kinetic energy and initial rotational kinetic energy which can both be converted into gravitational potential energy. Therefore the hill with friction will let the ball reach higher.
Explanation:
The ball has an initial linear kinetic energy and initial rotational kinetic energy which can both be converted into gravitational potential energy. Therefore the hill with friction will let the ball reach higher.
This is because:
If we consider the ball initially at rest on a frictionless surface and a force is exerted through the centre of mass of the ball, it will slide across the surface with no rotation, and thus, there will only be translational motion.
Now, if there is friction and force is again applied to the stationary ball, the frictional force will act in the opposite direction to the force but at the edge of the ball that rests on the ground. This friction generates a torque on the ball which starts the rotation.
Therefore, static friction is infact necessary for a ball to begin rolling.
Now, from the top of the ball, it will move at a speed 2v, while the centre of mass of the ball will move at a speed v and lastly, the bottom edge of the ball will instantaneously be at rest. So as the edge touching the ground is stationary, it experiences no friction.
So friction is necessary for a ball to start rolling but once the rolling condition has been met the ball experiences no friction.
The Currituck Beach Light<span> is a </span>lighthouse<span> located on the </span>Outer Banks<span> in </span>Corolla<span>, </span>North Carolina<span>.</span><span>
The strength of the beam in currituck beach lighthouse is </span>1,000 watts
Translational kinetic energy of a body is equal to one-half the product of its mass, m, and the square of its velocity, v, or 1/2mv2.
Answer:
Pressure is equal in A, B, C and D
Explanation:
Pressure does not depends on the shape of the container
Pressure acting all direction
You have to separate out Choice 2 from the top and the last one down. The other 2 are incorrect.
The formula is Work = Force * distance.
Distance in physics is well defined. It is a change in location. But if it is spinning on an axis, the axis at least is not changing location. I'm pick the second one down.