The velocity of a train relative to the ground is represented by the distance from A to B in the diagram. The velocity of a ball thrown inside the train at an angle of 66�� relative to the train is represented by the distance from B to C. What is the distance from A to C (the velocity of the ball relative to the ground), correct to two decimal places? Assume that all the points in the diagram lie in the same plane.

Question

The velocity of a train relative to the ground is represented by the distance from A to B in the diagram. The velocity of a ball thrown inside the train at an angle of 66������������������ relative to the train is represented by the distance from B to C. What is the distance from A to C (the velocity of the ball relative to the ground), correct to two decimal places? Assume that all the points in the diagram lie in the same plane.

anonymous · Answer

attachment

anonymous · Answer

@ganeshie8

ganeshie8 · Answer

I think you just need to use cosine law

anonymous · Answer

what would i plug in the formula ?

ganeshie8 · Answer

http://www.wolframalpha.com/input/?i=sqrt%2815%5E2%2B10%5E2-2*15*10*cos%28180-66%29%29

ganeshie8 · Answer

that means the velocity of ball relative to ground is 21.14 m/s eventhough the ball was thrown at 10m/s inside the train

anonymous · Answer

ok Thank for everyone who saw