2022 · Q24
If an object of mass 10 kg is moving with a uniform speed of 10 m/s, then the linear momentum and the kinetic energy of the object, respectively, are
General KnowledgePhysics
- A100 N.s and 500 J
- B100 N.s and 1000 J
- C200 N.s and 500 J
- D200 N.s and 1000 J
Explanation
Linear momentum p = mv = 10 kg x 10 m/s = 100 kg m/s, i.e. 100 N-s. Kinetic energy = 1/2 mv^2 = 1/2 x 10 x 100 = 500 J. The other combinations misstate one of the two quantities. Hence the values are 100 N-s and 500 J.