AP Physics 1 Rotational Dynamics

Four objects are held in position at the corners of a rectangle by light rods as shown. Find the moment of inertia of the system about the x-axis.

• 99.0 kg·m²

• 44.0 kg·m²

• 143 kg·m²

• 63 kg·m²

Four objects are held in position at the corners of a rectangle by light rods as shown. Find the moment of inertia of the system about the y-axis.

• 99.0 kg·m²

• 44.0 kg·m²

• 143 kg·m²

• 63 kg·m²

Four objects are held in position at the corners of a rectangle by light rods as shown. Find the moment of inertia of the system about an axis through O and perpendicular to the page.

• 99.0 kg·m²

• 44.0 kg·m²

• 143 kg·m²

• 63 kg·m²

A large grinding wheel in the shape of a solid cylinder $\left(I=\frac{1}{2}MR^2\right)$  of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 250 N applied to its edge causes the wheel to have an angular acceleration of 0.940 rad/s2. What is the moment of inertia of the wheel?

• 87.8 kg·m²

• 0.0114 kg·m²

• 712 kg·m²

• 806 kg·m²

Tags

NGSS.HS-PS2-1

A large grinding wheel in the shape of a solid cylinder  $\left(I=\frac{1}{2}MR^2\right)$  of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 250 N applied to its edge causes the wheel to have an angular acceleration of 0.940 rad/s2. What is the mass of the wheel?

• 1.61 x 10 ³ kg

• 4.88 x 10 ³ kg

• 266 kg

• 532 kg

Tags

NGSS.HS-PS2-1

A large grinding wheel in the shape of a solid cylinder  $\left(I=\frac{1}{2}MR^2\right)$  of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 250 N applied to its edge causes the wheel to have an angular acceleration of 0.940 rad/s2. If the wheel starts from rest, what is its angular velocity after 5.00 s have elapsed, assuming the
force is acting during that time?

• 4.70 rad/s

• 11.8 rad/s

• 23.5 rad/s

• 5.32 rad/s

Tags

NGSS.HS-PS2-1

A potter’s wheel having a radius of 0.50 m and a moment

of inertia of 12 kg ·m² is rotating freely at 50 rev/min. The

potter can stop the wheel in 6.0 s by pressing a wet rag against the rim and exerting a radially inward force of 70 N. Find the acceleration of the wheel.

• - 0.87 rad/s²

• -8.33 rad/s²

• -52.4 rad/s²

• -3.14 x 10³ rad/s²

Tags

NGSS.HS-PS2-1

A potter’s wheel having a radius of 0.50 m and a moment

of inertia of 12 kg ·m² is rotating freely at 50 rev/min. The

potter can stop the wheel in 6.0 s by pressing a wet rag against the rim and exerting a radially inward force of 70 N. Find the magnitude of the net torque on the wheel.

• 35 N·m

• 140 N·m

• 70 N·m

• 11 N·m

Tags

NGSS.HS-PS2-1

A potter’s wheel having a radius of 0.50 m and a moment

of inertia of 12 kg ·m² is rotating freely at 50 rev/min. The

potter can stop the wheel in 6.0 s by pressing a wet rag against the rim and exerting a radially inward force of 70 N. Find the effective coefficient of kinetic friction between the wheel and the wet rag.

• 3.3

• 0.50

• 1.0 N·m

• 0.30

Tags

NGSS.HS-PS2-1