Physics 1 Reviewer 01

Find the moment of inertia of a solid disc of mass 4 kg and radius 0.4 m about its central axis.

• 0.26 kg·m²

• 0.32 kg·m²

• 0.48 kg·m²

• 0.64 kg·m²

A thin spherical shell has a mass of 1.2 kg and a radius of 0.25 m. Find its moment of inertia.

• 0.08 kg·m²

• 0.075 kg·m²

• 0.06 kg·m²

• 0.05 kg·m²

Calculate the torque produced by a 90 N force applied perpendicularly to a 0.25 m wrench.

• 18 Nm

• 22 Nm

• 25 Nm

• 30 Nm

A rotating wheel moves clockwise. What is the sign of the torque?

• Positive

• Negative

• Neutral

• Both

A satellite rotates 2.5 revolutions per minute. Determine its angular velocity in rad/s.

• 0.24

• 0.26

• 0.28

• 0.32

What happens to the air pressure as a mountain climber ascends to higher altitude?

• Increases

• Decreases

• Constant

• Oscillates

A flywheel of mass 160 kg and radius 0.5 m starts from rest and reaches 100 rpm in 25 s. How much work is done?

• 2150 J

• 3000 J

• 3450 J

• 3900 J

The SI unit of torque is __________.

• N/m

• N·m

• N/m²

• J/s

A geostationary satellite orbits with radius 4.20 × 10⁷ m. If the angular separation between two satellites is 4°, find the arc length between them.

• 2.5 × 10⁶ m

• 3.0 × 10⁶ m

• 2.9 × 10⁶ m

• 4.5 × 10⁶ m

Which shape has the greatest moment of inertia among objects of equal mass and radius?

• Hoop

• Solid Sphere

• Solid Disk

• Hollow Sphere