`20kg` ভরের একটি গোলাকার বল `100m` উচ্চতার পাহাড়ের চূড়ায় স্থির থাকে
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A bullet of mass 20gram strikes a target with a velocity of 100m // s and is brougth to rest after piercing 20cm into it. What is the average force of resistance offered by the target?
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The average power of the pump which lifts 20kg of water per second from a well 10m deep and projects it with a velocity 10m//s is (g=10m//s^(2))
A bullet of mass 0.1 kg is fired with a speed of 100 m//sec , the mass of gun is 50 kg . The velocity of recoil is
