1. Florence Griffith-Joyner of the United States set the women’s world record for the 200 m run by running with an average speed of 9.37 m/s. Suppose Griffith-Joyner wants to jump over a river. She runs horizontally from the river’s higher bank at 9.37 m/s and lands on the edge of the opposite bank. If the difference in height between the two banks is 2.00 m, how wide is the river?

Question

1.	Florence Griffith-Joyner of the United States set the women’s world record for the 200 m run by running with an average speed of 9.37 m/s. Suppose Griffith-Joyner wants to jump over a river. She runs horizontally from the river’s higher bank at 9.37 m/s and lands on the edge of the opposite bank. If the difference in height between the two banks is 2.00 m, how wide is the river?

shamim · Answer

formula is$$h=ut+\frac{ 1 }{ 2 }g t ^{2}$$

shamim · Answer

but initial velocity is$$u=0$$

shamim · Answer

so$$h=\frac{ 1 }{ 2 }g t ^{2}$$

shamim · Answer

$$t=\sqrt{\frac{ 2h }{ g }}$$

shamim · Answer

wide of river will b$$s=9.37t$$