A Particle Of Mass 2 Mg Moves With Constant Speed And Is Found To Pass Two Points 5 M Apart In A Time Interval Of 5 Ms

Q. A particle of mass 2 mg moves with constant speed and is found to pass two points 5.0 m apart in a time interval of 5 ms. Find the kinetic energy of the particle

1) 1 J

2) 2 J

3) 3 J

4) 4 J

Answer:

1) 1 J

Solution:

Velocity = Distance/Time

= 5/5 x 10^-3 m/s

= 1000 m/s

Kinetic energy = (1/2)mv²

= (1/2) x 2 x 10^-3 (1000)²

= 1 J