GIKI Engineering Computing MCQs

Centripetal acceleration changes the direction of velocity.
It always points radially inward.

At maximum height, final vertical velocity is zero.
0=20-10t gives t=2 s.

Centripetal force is not a separate force type.
It may be supplied by tension, friction, gravity, or another force.

Use v²=u²-2gh with v=0.
0=400-20h, so h=20 m.

A particle in translational equilibrium has no acceleration.
It may be at rest or moving at constant velocity.

Newton's second law gives F=ma.
F=5×4 = 20 N.

In ideal free fall, air resistance is neglected.
All objects then have the same gravitational acceleration locally.

Slope gives change in displacement per unit time.
That is the definition of velocity.

Slope gives change in velocity per unit time.
That is acceleration.

Integrating velocity over time gives displacement.
Areas below the time axis count as negative displacement.

Uniform acceleration means velocity changes by equal amounts in equal times.
The standard kinematic equations apply.

Inertia is related to mass.
Greater mass means greater resistance to acceleration.