CBSE Class 9 Physics Newton's Third Law of Motion

• A girl of mass 40 kg jumps with a horizontal velocity of 5m/s onto a stationary cart with frictionless wheels.The mass of the cart is 3 kg.What is her velocity as the cart starts moving?Assume that there is no external unbalnaced force working in the horizontal direction.  
• define thrust
• What is Newtons third law of motion
• I would like to know whether action and reaction can be interchanged in newtons third law
•  according to newtons third law to every action there is equal and opposite reaction but I have a doubt whether action should happen first or the reaction
• Hitting the ball to the floor is an example for Newton's third law?
• First law and second law and third law motion examples
• 3 rd law motion formula  
• If action and reaction forces are equal and opposite, then why do they result in change in momentum of the body?
• Why is it difficult for a fireman to hold a hose pipe, which ejects a large amount of water at a high velocity?

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