General Physics Quiz

A wheel starts from rest and has a constant angular acceleration of 4 rad/s². What is the angular velocity of the wheel after 3 seconds?

• 4 rad/s

• 8 rad/s

• 12 rad/s

• 16 rad/s

A disc rotates with a constant angular acceleration of 2 rad/s². If its initial angular velocity is 3 rad/s, what will be its angular displacement after 5 seconds?

• 25 rad

• 40 rad

• 50 rad

• 75 rad

A particle of mass 2 kg is moving in a circle of radius 1 m with an angular velocity of 5 rad/s. What is its angular momentum?

• 5 kg·m²/s

• 10 kg·m²/s

• 15 kg·m²/s

• 20 kg·m²/s

A solid sphere of mass 3 kg and radius 0.5 m rotates about an axis through its center with an angular velocity of 6 rad/s. What is its angular momentum?

• 1.8 kg·m²/s

• 3 kg·m²/s

• 4.5 kg·m²/s

• 6 kg·m²/s

A torque of 10 Nm is applied to a rotating object, causing its angular momentum to change by 40 kg·m²/s. How long did the torque act on the object?

• 2 s

• 4 s

• 6 s

• 8 s

A wheel with a moment of inertia of 2 kg·m² is subjected to a torque of 8 Nm. What is the angular acceleration of the wheel?

• 2 rad/s²

• 3 rad/s²

• 4 rad/s²

• 6 rad/s²

The gravitational force between two masses is 36 N when they are 2 meters apart. What will the force be when the distance between them is doubled?

• 9 N

• 18 N

• 36 N

• 72 N

A 5 kg object is located on the surface of Earth where the acceleration due to gravity is 9.8 m/s². What is its weight?

• 45 N

• 49 N

• 98 N

• 490 N

Which of the following statements is true about the gravitational field inside a uniform spherical shell?

• It is zero at all points inside the shell.

• It remains constant at all points inside the shell.

• It increases linearly with distance from the center.

• It decreases linearly with distance from the center.

A satellite orbits Earth at an altitude where the gravitational acceleration is 7.35 m/s². What is the radius of its orbit? (Assume g Earth =9.8 m/s², R Earth =6.37×10³ m)

• 7.50×10⁶ m

• 8.15×10⁶ m

• 9.00×10⁶ m

• 10.1×10⁶ m