In 1897 ,J.J Thomson invented which particle?

According to Thomson the direction cathode particle in electric discharge tube by electrical and magnetic . Field depends which factors?

A uniform force of ( 3hat(i)+hat(j)) N acts on an particle of mass 2 kg . Hence the particle is displaced from position (2hat(i)+hat(k)) m to position (4hat(i)+3hat(j)-hat(k)) m . The work done by the force on the particle is

Forces acting on a particle have magnitude of 14N, 7N and 7N act in the direction of vectors 6hat(i)+2hat(j)+3hat(k),3hat(i)-2hat(j) +6hat(k),2hat(i)-3hat(j)-6hat(k) respectively. The forces remain constant while the particle is displaced from point A: (2,-1,-3) to B: (5,-1,1). Find the work done. The coordinates are specified in meters.

The P.E. of an oscillation particle at rest position is 10J and its average K.E. is 5J . The total energy of particle at any instant will be-

A particle moving with kinetic energy = 3J makes an elastic head-on collision with a stationary particle which has twice its mass. During the impact :-

A vec(F) = (5hat(i) +3hat(j) +2hat(k))N is applied over a particle which displaces it from its origin to the point vec(r ) = (2 hat(i) - hat(j))m . The work done on the particle in joule is ……….

A partical of mass 2kg is moving on the x- axis with a constant mechanical energy 20 J . Its potential energy at any x is U=(16-x^(2))J where x is in metre. The minimum velocity of particle is :-