DP014: C7 ROTATION OF RIGID BODY

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

• energy

• velocity

• force

• displacement

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

Condition for maximum torque is

• undefined=180 degree

• undefined= 0 degree

• not defined

All the forces rotating clockwise will have a _______ torque

• positive

• negative

Which will produce more torque to loosen the lug nut?

• A
• B
• They are the same

An angular speed of 40 revolution per minute is equivalent to

• 2.61 rad/s

• 4.19 rad/s

• 382 rad/s

• 0.07 rad/s

"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

How do you find the tangential speed of a rotating circle?

• v = ωr
• v = ωr²
• v = ωπ
• v = ωπr

An object is moving with uniform speed in a counterclockwise, horizontal circle. Which of the following images correctly depicts the force vector and velocity vector at a point in time.

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