A 87 arrow is fired from a bow whose string exerts an average force of 105 on the arrow over a distance of 75 .
What is the speed of the arrow as it leaves the bow?

What is the speed of the arrow as it leaves the bow?
What is the speed of the arrow as it leaves the bow?

Question

A 87 arrow is fired from a bow whose string exerts an average force of 105 on the arrow over a distance of 75 .
What is the speed of the arrow as it leaves the bow?

What is the speed of the arrow as it leaves the bow?
What is the speed of the arrow as it leaves the bow?

anonymous · Answer

87 wat? 87N, 87cm?

anonymous · Answer

It is 87g and the distance is 75cm and the force is 105N

anonymous · Answer

work = delta energy = 1/2mV^2
F*d = 1/2mV^2
sqrt(2F*d/m) = V

anonymous · Answer

mass in kg,  distance in meters, Force in Newtons... speed will be in meters/s

anonymous · Answer

Hey I solved it for V and got 1.345m/s but it is not right.  Did I solve it wrong?

anonymous · Answer

m= 87g * 1kg/1000g 
d = 75cm * 1m/100cm

anonymous · Answer

Oh ok I forget to convert grams.  That should wrk

anonymous · Answer

Thx