If a body of mass m is moving with constant speed v (also called tangential velocity) in a circular path of radius r, its tangential acceleration is:
Correct answer: C. Zero
- A. r v2
- B. v2/r
- C. Zero
- D. None of these
Explanation
When a body of mass m moves with a constant speed v in a circular path of radius r, its tangential acceleration is zero. This is because tangential acceleration is the rate of change of tangential velocity, and in this scenario, the speed is constant, so there is no change in tangential velocity. Therefore, the correct answer is 'Zero.' Option A and B are incorrect as they do not represent the correct formula for tangential acceleration in this situation. Option D is also incorrect as one of the given options is indeed the correct answer.
Last updated
About Force and Motion
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
(1, 1, 1) . (2, 2, 2)
1st law of motion gives the definition of:
2nd law of motion measures which quantity?
7.0 kg bowling ball experience a net force of 5.0N. What will be its acceleration?
A 0.2 kg rubber ball is dropped from the window of a building. It strikes the sidewalk below at 30m/s and rebounds up at 20m/s. The impulse on the ball during the collision is: