What is a force ?

What is the force experienced by a moving charge in a magnetic field?

What is forced vibration ?

A metal rod of length 'L' and cross-sectional area 'A' is heated through 'T'^(@)C What is the force required to prevent the expansion of the rod lengthwise ?

A wooden box of mass 8kg slides down an inclined plane of inclination 30^(@) to the horizontal with a constant acceleration of 0.4ms^(-2) What is the force of friction between the box and inclined plane ? (g = 10m//s^(2)) .

A silver atom in a solid oscillates in simple harmonic motion in some direction with a frequency of 10^(12)//sec . What is the force constant of the bonds connecting one atom with the other? (Mole wt. of silver = 108 and Avagadro number =6.02xx10^(23)" gm "mole^(-1))

What is a deforming force?

The mass of m_2 was reduced to 50% and the force exerted by m_1 on m_2 is 20 N. what is the force exerted by m_2 on m_1 ?

What is Lorentz force equation?

What kind of force keeps the body at rest?

Answer the following question : What is a contact force ? Give one example.