D4(RAH) APPLIED MECHANICS QUIZ OF THE DAY

Which of the following is a scalar quantity?

• Force
• Velocity
• acceleration

• Distance

Answer explanation

Distance is a scalar quantity as it has only magnitude and no direction.

What is the dimensional formula of force?

• M¹L¹T⁻¹
• M¹L¹T⁻²
• M¹L²T⁻²
• M¹L⁻¹T⁻²

Answer explanation

The dimensional formula of force is M¹L¹T⁻² as per Newton's second law (F = ma).

Which prefix represents 10^6?

• Kilo
• Mega
• Giga
• Tera

Answer explanation

The prefix 'Mega' represents 10^6 as per the standard SI unit prefixes.

What is the value of 1 kgf in Newtons?

• 7.233 N
• 9.81 N
• 10 N
• 105 N

Answer explanation

1 kilogram-force (kgf) is equal to 9.81 Newtons as per gravitational conversion.

Which system uses poundal as a unit of force?

• FPS system
• MKS system
• CGS system
• SI system

Answer explanation

Poundal is a unit of force in the FPS (Foot-Pound-Second) system.

What is the freezing point of water in Fahrenheit scale?

• 0°F
• 32°F
• 100°F
• 212°F

Answer explanation

Freezing point of water on Fahrenheit scale is 32°F.

Which law states that 'For every action, there is an equal and opposite reaction'?

• First Law of Motion
• Second Law of Motion
• Third Law of Motion
• Law of Universal Gravitation

Answer explanation

Newton's Third Law states: For every action, there is an equal and opposite reaction.

What is the formula for work done?

• W = F + S
• W = F/S
• W = F × S
• W = F × V

Answer explanation

Work done is calculated by multiplying force with displacement in the direction of the force (W = F × S).

Which of the following best defines kinetic energy?

• Energy possessed due to position
• Energy possessed due to motion
• Energy dissipated as heat
• Energy lost due to friction

Answer explanation

Kinetic energy is the energy possessed by a body due to its motion (KE = 1/2 mv²).

In Lami’s theorem, what must be true for equilibrium?

• Forces proportional to cosines of angles
• Forces proportional to sines of angles
• Forces proportional to the sides of a triangle
• Sum of forces is zero

Answer explanation

In Lami's theorem, forces are proportional to the sines of the angles between the other two forces.