A vehicle of mass 20 kg moves around a curve whose radius of curvature is 10m at a speed of 20ms-1 The centripetal force on the vehicle is:
Correct answer: A. 800 N
- A. 800 N
- B. 200 N
- C. 4000 N
- D. 40 N
Explanation
Centripetal force is the force acting on an object moving in a curved path that keeps it moving in that path. In this question, the centripetal force can be calculated using the formula Fc = (m * v^2) / r, where m is mass, v is speed, and r is radius of curvature. Plugging in the values given in the question, we get (20 * 20^2) / 10 = 800 N. This is the correct centripetal force on the vehicle. The other options provide incorrect calculations or values, leading to incorrect answers.
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: