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Sahay Sir > Question Answers > JEE Mains Physics 2002-2019 Solved Video Solutions > Chapter 4 - Work, Energy and Power > Two particles of masses M and 2M moving as shown with speeds of 10 m/s and 5 m/s collide elastically at the origin. After the collision they move along the indicated directions with speeds v1 and v2 respectively are nearly :

Two particles of masses M and 2M moving as shown with speeds of 10 m/s and 5 m/s collide elastically at the origin. After the collision they move along the indicated directions with speeds v1 and v2 respectively are nearly :

A body of mass m=10−2kg is moving in a medium and experiences a frictional force F=−KV^2. Its initial speed is υ0=10ms^−2. If after 10s its energy is 1/8mυ^2 0 the value of k will be