21 Answered Questions for the topic Rotational Motion

Rotational Motion Physics

11/26/21

An electric fan blade is rotating at a rate of 230 rev/min when it is subsequently switched off.
An electric fan blade is rotating at a rate of 230 rev/min when it is subsequently switched off. The blade then takes 37 seconds to come to rest.A. What is the initial angular speed of the fan... more
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Rotational Motion Physics Gravitation

12/14/20

physics, rotational motion, gravitation, question is in description
Consider an apple at the top of a tree that is pulled by Earth’s gravity with a force of 1 N. If the tree were twice as tall, would the force of gravity be only ¼ as strong? Defend your answer.
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Rotational Motion Physics Gravitation

12/14/20

physics, rotational motion, gravitation, question is in description
By how much does the gravitational force between two objects decrease when the distance between their centers is doubled? Tripled? Increased tenfold?
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Rotational Motion Physics Gravitation

12/14/20

physics, rotational motion, gravitation, question is in description
If there is an attractive force between all objects, why do we not feel ourselves gravitating toward massive buildings in our vicinity?
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Rotational Motion Physics Gravitation

12/14/20

physics, rotational motion, gravitation, question is in description
Gravitational force acts on all bodies in proportion to their masses. Why, then, doesn’t a heavy body fall faster than a light body?
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Rotational Motion Physics Gravitation

12/14/20

physics, rotational motion, gravitation, question is in the description
According to the equation for gravitational force, what happens to the force between two bodies if the mass of one of the bodies is double? If both masses are double?
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Rotational Motion Physics

12/12/20

The factor most directly responsible for making a black hole invisible is its A) size. B) mass. C) color. D) surface escape velocity. E) none of these
The factor most directly responsible for making a black hole invisible is its A) size. B) mass. C) color. D) surface escape velocity. E) none of these
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Rotational Motion Physics

12/12/20

If you drop a stone into a hole drilled all the way to the other side of the Earth (neglect the molten core), the stone will

If you drop a stone into a hole drilled all the way to the other side of the Earth (neglect the molten core), the stone will A) come to an abrupt stop at the center of the Earth. B) speed up until... more
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Rotational Motion Physics

12/12/20

The force of gravity acts on all apples on an apple tree. Some apples are twice as far from the ground as others. These twice-as high apples, for the same mass, have

The force of gravity acts on all apples on an apple tree. Some apples are twice as far from the ground as others. These twice-as high apples, for the same mass, have A) 1/4 the weight. B) 1/2 the... more
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Rotational Motion Physics

12/12/20

physics Two objects move toward each other because of gravity. As the objects get closer and closer, the acceleration of each

Two objects move toward each other because of gravity. As the objects get closer and closer, the acceleration of each A) increases. B) decreases. C) remains constant
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Rotational Motion Physics

12/12/20

A very massive object A and a less massive object B move toward each other under the influence of gravitation. Which force, if either, is greater?

A very massive object A and a less massive object B move toward each other under the influence of gravitation. Which force, if either, is greater? A) the force on A B) the force on B C) Both forces... more
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Rotational Motion Physics

12/12/20

physics If the sun were twice as massive A) its pull on the Earth would double. B) the pull of the Earth on the sun would double. C) both of these D) neither of these
If the sun were twice as massive A) its pull on the Earth would double. B) the pull of the Earth on the sun would double. C) both of these D) neither of these
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Rotational Motion Physics

12/12/20

rotational motion physics question is below
If the radius of the Earth somehow decreased with no change in mass, your weight would A) increase. B) not change. C) decrease.
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Rotational Motion

08/11/18

Torque about the axis passing through the center of the circle.
A 0.75 kg airplane is attached by an arm rod of negligible mass flies in horizontal circle 1.5 m in radius. The airplane model acts a force of 0.8N perpendicular to the rod. By assuming the... more
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Rotational Motion Physics

10/29/17

Rotational Dynamics with sphere?
A uniform solid disk rolls without slipping down a 15.0° inclined plane. What is the acceleration of the disk's center of mass?The moment of inertia of a uniform solid disk about an axis that... more
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Rotational Motion Physics Inertia Collision

01/02/17

Rotational physics problem
a 1.5kg uniform rod of length .75 meters swings from rest around an axis through its end through an angle of 60 degrees. It strikes the center of a small .25 kg ball which sits on the edge of a... more
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Rotational Motion

12/22/16

prove velocity of a ball
A solid spherical ball which rests in equilibrium at the interior bottom of a fixed spherical globe is perfectly rough. the ball is struck a horizontal blow of such magnitude that the initial... more
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Rotational Motion

01/11/16

The rotor of an electric motor has a rotational inertia of 45 kg/m2. what is its kinetic energy if it turns at 1500 rev/min?
45 kg/m2 is the proper way of writting it
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Rotational Motion Physics Ap Physics

01/05/16

AP Physics (rotational motion question)
The drum shown in the figure has a radius of .4 meters and a moment of inertia of 2.3 kgm^2 about an axis perpendicular to it through its center. The frictional torque at the drum axle is 3 Nm. A... more
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05/19/15

A child is on a object that is spinning. How can he increase the system’s rotational momentum?
a) Move away from centerb) Move toward centerc) Move in opp. direction to motiond) none of the above   what's the answer???????????
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Rotational Motion Physics Tires

08/27/14

Stuck on physics rotational motion question.
The tires of a car makes 65 revolutions as the car reduces its speed uniformly from 80km/h to 30km/h. The tires have a diameter of 8.0m. What was the angular acceleration of the tires?   I know... more
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