Mastering Mechanics: Understanding Net Torque, Friction Coefficients, and Work

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In summary, "Need help with QUESTIONS" is a request for assistance with a specific topic, issue, or problem. There are various ways to get help with questions, such as consulting with friends, online resources, or professionals. If an answer cannot be found, it may be helpful to rephrase the question or seek assistance from different sources. To ask good questions and receive the best help, it is important to be clear, specific, and respectful. Asking for help with questions is completely acceptable and can lead to a deeper understanding and growth.
  • #1
danieltan
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1. The Net Torque always produces _____ acceleration.
a. Angular
b. Linear
c. Constant
d. Deceleration

ANSWER: (A) Angular

2. The coefficient of _____ friction depends on the materials and surfaces in contact.
a. Sliding friction
b. Static friction
c. Kinetic friction
d. Rolling friction

ANSWER: (B) Static Friction

3. Work is done by a constant force acting on a moving body with a _____ .
a. Constant speed
b. Straight line displacement
c. Constant displacement
d. Straight line distance

ANSWER: (B) Straight line displacement


I’m not sure if my answers are correct, suggestions are highly appreciated...
 
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  • #2


Your answers are correct! Great job. Keep in mind that for question 3, the correct answer is (B) Straight line displacement, not (C) Constant displacement. Keep up the good work!
 
  • #3


Your answers are all correct! Here are some additional points to consider:

- Net torque is the sum of all the torques acting on an object and it produces angular acceleration, which is a change in rotational speed.
- The coefficient of sliding friction is used when two surfaces are sliding against each other, while the coefficient of static friction is used when two surfaces are stationary and not sliding.
- Work is defined as the product of force and displacement, and it is only done when there is a displacement in the direction of the force. Therefore, a straight line displacement is necessary for work to be done.
- It's also important to note that the units for torque are often given in newton-meters (Nm) or foot-pounds (ft-lb), while the units for work are joules (J) or foot-pounds (ft-lb). This is because torque is a rotational force, while work is a linear force.
 

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