tau = Ixalpha for an object rotating about a fixed axis, where \( \tau \) is the net torque acting on it, \( I \) is its rotational inertia, and \( \alpha \) is its angular acceleration. This expression
Correct answer: A. Follows directly from Newton's second law
- A. Follows directly from Newton's second law
- B. Is the definition of angular acceleration
- C. Is the definition of linear acceleration
- D. Is the definition of torque
Explanation
Newton's second law for rotational motion is \( \tau = I\alpha \), where \( \tau \) is the net torque, \( I \) is the rotational inertia, and \( \alpha \) is the angular acceleration
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Newton's Laws of Motion
Newton’s laws explain inertia, the relation between net force and acceleration, and action-reaction pairs. Questions involve free-body diagrams, balanced and unbalanced forces, F = ma, force as the rate of change of momentum, and identifying genuine third-law pairs, which act on different bodies.
Practise Force and Motion
1,416 free Force and Motion MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Newton's Laws of Motion questions
A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position, the tension in the string is
When a body is whirled in a horizontal circle by means of a string, the centripetal force is supplied by
The dimension of force is____________________?
A 60kg man in a lift which is moving upward with an acceleration of 4.8m/s² will have an apparent weight of
The apparent weight of a pilot when diving down in a jet plane with an acceleration of 9.8m/s² will become
A car is moving with high velocity when it has a turn. A force acts on it outwardly because of