Which equation defines kinetic energy?

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Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

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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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

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 translational (linear) kinetic energy?

• 1.40 J

• 2.80 J

• 56.0 J

• 0.560 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

Which forms of energy are present for objects in an Atwood’s machine?

• Gravitational potential energy

• Elastic potential energy

• Kinetic energy

• Rotational kinetic energy

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Which are true for angular momentum?

• Its symbol is $L$ .

• It is equal to the product of $I$ and $\omega$ .

• It exists for all objects that are moving.

• It exists only for rotating objects or objects moving in a circle.

Which equation shows the correct relationship between angular momentum and torque?

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Which are true for the man in the figure, as he pulls his arms closer, assuming there is negligible resistance?

• His linear speed increases.

• His angular speed increases.

• His moment of inertia increases.

• His angular momentum increases.