Physics
posted by Justin .
An arrow with a mass of 30g is shot straight up to a height of 130m what is the arrow's initial velocity?

Potential energy at max height = (initial kinetic energy)
m g h = (1/2) m V^2
Cancel the m's and solve for V 
ok thanks that is what i thought it might be but i just wanted to make sure. I also have another problem that i am hoping that you could help me with. A car requires 30 horsepower to move at a constant 20m/s what is the amount of friction that is needed to overcome?
Respond to this Question
Similar Questions

Physics
Three arrows are shot at different angles. A red arrow is shot at 30degrees, a blue arrow is shot at 45degrees, and a yellow arrow is shot at 60degrees. A) Which arrow goes the farthest? 
Physics
An arrow is shot a 30.0° above the horizontal. Its velocity is 49 m/s and it hits the target. a. What is the maximum height the arrow will attain? 
Physics
An arrow is shot at 29.0° above the horizontal. Its initial speed is 54 m/s and it hits the target. (a) What is the maximum height the arrow will attain? 
Physics
An arrow is shot at 29.0° above the horizontal. Its initial speed is 54 m/s and it hits the target. (a) What is the maximum height the arrow will attain? 
Calculus
If an arrow is shot straight up from the surface of the moon with an initial velocity of 100 ft/s, its height in feet after t second is given by s(t)=(100t)−(83/100)(t^2). Use the limit definition of the derivative to find the … 
physics
an arrow is shot vertically upward 2 seconds later it is at a height of 42m (this may not be necesarily its highest point)with what velocity was the arrow shot, how long is the arrow in flight altogether 
physics
an arrow is shot vertically upward after 2s it is at a height of 36m although this is not necessarily the highest point with what velocity was the arrow shot what is the maximum height reached by the arrow how long is the arrow in … 
physics
an arrow is shot vertically upward 2 seconds later it is at a height of 42m with what velocity was the arrow shot, how long is the arrow in flight altogether 
physics
an arrow is shot vertically upward 2 seconds later it is at an height of 42m (not necessarily the highest point) with what velocity was the arrow shot how long was the arrow in flight altogether 
Physics
An arrow is shot at 28.0 degrees above the horizontal. Its velocity is 52 m/s, and it hits the target. (a) What is the maximum height the arrow will attain?