Rotational of Rigid Body

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

• Average angular velocity, 𝝎_𝒂𝒗

• Angular displacement,𝜽

• Instantaneous 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

• Instantaneous angular velocity, 𝝎

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 elliptical path, which of the following quantities remain constant

• potential energy

• linear momentum

• angular momentum

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

• period

• angular acceleration

• rigid body

• radius of gyration

If a system is in static equilibrium, it must have the following 2 conditions:

• ∑τ=0

• Constant acceleration

• ∑F=0

• Positive forces only

Conditions for equilibrium are:

1st condition: net force = 0

2nd condition:net torque = 0

Moving with constant velocity or Stationary/ rest

• True

• False

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 far from the hinges
• At the top of the door

Tags

NGSS.HS-PS2-1

Below are the example of rigid body except:

• Beam

• Slab

• Cement

• Column