A 120 g mass has a velocity `vecv=2hati+5hatj m s^(-1)` at a certain instant. Its kinetic energy is

A 150 g mass has a velocity vec(v)=(2hat(i)+6hat(j))m//s at a certain instant. What is its kinetic energy?

A 300 g mass has a velocity of (3hati + 4hatj) m//s at a certain instant what is its K.E. ?

A particle of mass 1 g moving with a velocity vecv_1=3hati-2hatj m s^(-1) experiences a perfectly in elastic collision with another particle of mass 2 g and velocity vecv_2=4hatj-6 hatk m s^(-1) . The velocity of the particle is

A particle of mass 1 g moving with a velocity vecv_1=3hati-2hatj m s^(-1) experiences a perfectly in elastic collision with another particle of mass 2 g and velocity vecv_2=4hatj-6 hatk m s^(-1) . The velocity of the particle is

A 2.0 kg particle has a velocity of vecv_1=(2.0hati-3.0hatj) m //s , and a 3.0 kg particle has a velocity vecv_2=(1.0hati+6.0hatj)m//s . How fast is the center of mass of the particle system moving?

A body of mass 0.8 kg has intial velocity (3hati-4hatj) ms^(-1) and final velocity (-6hatj+2hatk) ms^(-1) . Find change in kinetic energy of the body?

A body of mass 0.8 kg has intial velocity (3hati-4hatj) ms^(-1) and final velocity (-6hatj+2hatk) ms^(-1) . Find change in kinetic energy of the body?

A particle of mass 1.0 g moving with a velocity vecv_1 = (3hati - 2hatj) m/s experiences a perfectly inelastic collision with another particle of mass 2.0 g and velocity vecv_2 = (4hati - 6hatj) m/s. Find the magnitude of the velocity vector vecv of the coalesced particles.

Motion of Mass Center in Vector Form A 2.0 kg particle has a velocity of vecv_1=(2.0hati-3.0hatj) m /s, and a 3.0 kg particle has a velocity vecv_2=(1.0hati+6.0hatj) m/s. (a) How fast is the center of mass of the particle system moving? (b) Find velocities of both the particles in centroidal frame.

A rod AB of length 2m moves in horizontal x-y plane. At any instant end a of the rod is at origin and has velocity vecv_(A)=2hati+v_(y)hatj . The other end B at the same instant is moving with velocity vecv_(B)=3hati+6hatj . The rod makes an angle of 30^(@) with the x- axis at this instant (see figure) The magnitude of angular velocity of the rod is