Rotational Motion and Energy

What is the total kinetic energy of a 3 kg solid disk (I = 1/2mr2) with a diameter of 80 cm rolling at 4 m/s?

• 12 J

• 24 J

• 36 J

• 48 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Which equation defines linear (or transnational) kinetic energy?

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Which equation defines the relationship between linear velocity and angular velocity?

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Which equation defines rotational kinetic energy?

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Tags

NGSS.HS-PS3-2

A bowling ball has a mass of 7.00 kg, a moment of inertia of 2.80 × 10⁻² kg·m², and a radius of 0.100 m. If it rolls down the lane without slipping at an angular speed of 4.00 rad/s, what is its rotational kinetic energy?

• 0.280 J

• 0.448 J

• 0.224 J

• 11.2 J

Tags

NGSS.HS-PS3-1

Which forms of energy are present for objects rolling down an incline?

• Gravitational potential energy

• Elastic potential energy

• Kinetic energy

• Rotational kinetic energy

Tags

NGSS.HS-PS3-2