Force, Motion & Gravity MCQs with Answers

Velocity of Efflux is measured by which relation?

• A.v = gh/2
• B.v = √(gh/2)
• C.v = 2√(gh)
• D.v = √(2gh)

The motion of a falling ball towards Earth is due to the _?

• A.Gravitational force
• B.Magnetic force
• C.Frictional force
• D.Electrostatic force

What will be the time period of a spring mass system, if mass m is connected with two springs k1 and k2 in parallel?

• A.T = 1/(2π) √(m/(k1 + k2))
• B.T = 2π √((k1 + k2)/m)
• C.T = 2π √(m × (k1 + k2))
• D.T = 2π √(m/(k1 + k2))

A block of mass 5 kg is pulled up a frictionless incline with a force of 20 N. What is the acceleration of the block?

• A.2 m/s²
• B.10 m/s²
• C.5 m/s²
• D.4 m/s²

What is the approximate value of gravitational acceleration on Earth?

• A.9.2 m/s²
• B.8.9 m/s²
• C.10.2 m/s²
• D.9.8 m/s²

The value of 'g' at the equator is _?

• A.Greater than at poles
• B.Zero
• C.Equal to that at poles
• D.Smaller than at poles

A force on a particle is conservative if ?

• A.Its work depends on the end points of every motion, not on the path between them
• B.Its work depends only on the path taken, not on the end points
• C.Its work is always zero regardless of the path taken
• D.Its work increases with the speed of the particle

The angle at which X and Y components of a force are equal is?

• A.30°
• B.45°
• C.60°
• D.90°

What is the dimensional formula of Momentum?

• A.[M L² T⁻¹]
• B.[M L T⁻²]
• C.[M L T⁻¹]
• D.[M² L T⁻¹]

A light spring of constant K is cut into two equal parts. The spring constant of each part is ?

• A.K
• B.K/2
• C.2K
• D.4K