Topic 8 Rotational of Rigid body

"Angle undergoes from a fixed reference line" this statement refer to

• Linear displacement

• Angular displacement,𝜽

• Angular velocity, 𝝎

• Angular acceleration

"Rate of change of angular displacement" this statement refer to

• Angular displacement,𝜽

• angular acceleration

• Average angular velocity, 𝝎_av

• Instantaneous angular velocity, 𝝎

"Angular acceleration at a specified position or at a particular of time" this statement refer to

• Average angular velocity, 𝝎_av

• Angular displacement,𝜽

• Instantaneous angular acceleration, 𝜶

• average angular acceleration, 𝜶_av

Torque is define as cross product between distance, r and __________

• energy

• velocity

• force

• displacement

When there is no external torque acting on a body moving in circular path, which of the following quantities remain constant

• potential energy

• linear momentum

• angular momentum

• angular displacement

A body with a definite shape that doesn't change is:

• period

• angular acceleration

• rigid body

• radius of gyration

In which condition will you see a rigid body to be in equilibrium?

• ∑ τ = 0

• ∑F=0

• Both ΣF ≠ 0 and Σ𝜏 ≠ 0

• Both ΣF = 0 and Σ𝜏 = 0

The number of complete revolutions per second is :

• frequency

• period

• torque

• rotational inertia

The torque produce by the force F shown in Figure above is given by .................. and the force F rotate the object ..............

• F r cos θ ; clockwise

• F r cos θ ; counterclockwise

• F r sinθ ; clockwise

• F r sinθ ; counterclockwise

The easiest way to open a heavy door is by applying the force

• Near the hinges

• In the middle of the door

• At the edge of the door farthest from the hinges

• At the top of the door