Fundamentals of Engineering Statics and Dynamics 3

Question 1

Conservation of linear momentum applies when:

Accepted Answer

No external forces act on the system

Answer

All forces are equal

Answer

Kinetic energy is conserved

Answer

The system is at rest

Question 2

What is the period of oscillation for a simple pendulum with length L on Earth (g = 9.81 m/s²)?

Accepted Answer

T = 2π√(L/g)

Answer

T = 2π√(g/L)

Answer

T = π√(L/g)

Answer

T = √(L/g)

Question 3

What is the moment of inertia of a solid cylinder of mass m and radius r about its central axis?

Accepted Answer

mr²/2

Answer

mr²

Answer

2mr²/5

Answer

mr²/3

Question 4

In projectile motion (neglecting air resistance), which component of velocity remains constant?

Accepted Answer

Horizontal velocity

Answer

Vertical velocity

Answer

Total velocity magnitude

Answer

Both components

Question 5

What is the unit of angular momentum in the SI system?

Accepted Answer

kg·m²/s

Answer

kg·m/s

Answer

N·m

Answer

kg·m²/s²

Question 6

In an elastic collision between two objects, which quantities are conserved?

Accepted Answer

Both momentum and kinetic energy

Answer

Momentum only

Answer

Kinetic energy only

Answer

Potential energy only