# phyics

A dart leaves the barrel of a blowgun at a speed v. The length of the blowgun barrel is L. Assume that the acceleration of the dart in the barrel is uniform.

Find a time that the dart moves inside the barrel.
Express your answer in terms of the variables L and v.

If the dart's exit speed is 16.0 m/s and the length of the blowgun is 1.10 m , find the time the dart is in the barrel.
Express your answer with the appropriate units.

1. 👍
2. 👎
3. 👁
1. It started at v = 0
It exited at v = v
v versus t is LINEAR (constant acceleration)
Therefore Vaverage = v/2
L = Vaverage * t
so
t = L/Vaverage = 2 L / v

t = 2 * 1.10 / 16.0

1. 👍
2. 👎

## Similar Questions

1. ### AP Physics

A dart gun vertically launches a 25g dart 50 cm high. Determine the minimum energy stored in the spring when the dart gun was loaded. What would the qualitative bar graph and energy flow diagrams look like?

2. ### Physics

Typically a bullet leaves a standard 45 caliber pistol at 262 m/s. If it takes 1 millisecond to transverse the barrel, determine the average acceleration experienced by the 16.2-gram bullet within the gun's barrel and then compute

3. ### physics

A 2.0 g bullet leaves the barrel of a gun at a speed of 260 m/s. (a) Find its kinetic energy. J (b) Find the average force exerted by the expanding gases on the bullet as the bullet moves the length of the 43 cm long barrel. N

4. ### math

Garrett throws a dart at a circular dart board. The dart board has a radius of 15 inches, and the bull’s eye in the center of the dart board has a radius of 2 inches. What is the probability that a dart thrown at random within

1. ### physics

a 15-g bullet is fired from a rifle. it takes 2.50 * 10^-3s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 715 m/s. assuming that the acceleration of the bullet is constant, find the

2. ### Math

Garrett throws a dart at a circular dart board. The dart board has a radius, and the bull's eye in the center of the dart board has a radius of 6 inches. What is the probability that a dart thrown at random within the dartboard

3. ### Physics

typically a bullet leaves a standard 45 caliber pistol at 262 m/s. if it takes i millisecond to transverse the barrel, determine the average acceleration experienced by the 16.2 gram bullet within the gun's barrel and then compute

4. ### physics

The speed of a bullet as it travels down the barrel of a rifle toward the opening is given by v=(-5.00×10^7)t^2 + (3.00×10^5)t where v is in meters per second and t is in seconds. The acceleration of the bullet just as it leaves

1. ### Physics

An open tube of length L = 1.60 m and cross-sectional area A = 4.60 cm2 is fixed to the top of a cylindrical barrel of diameter D = 1.27 m and height H = 2.16 m. The barrel and tube are filled with water (to the top of the tube).

2. ### physics

To test out your new foam dart blaster, you hang a small cube, size 5cm on a side with mass 0.5 kg, from your ceiling. You then fire a 41.9 gram foam dart at the bottom of it with a speed of 18 m/s, and the dart sticks to the

3. ### physics

Many cultures around the world still use a simple weapon called a blowgun, a tube with a dart that fits tightly inside. A sharp breath into the end of the tube launches the dart. When exhaling forcefully, a healthy person can

4. ### Physics

You are practicing throwing darts in your dorm. You stand 3.21 m from the wall on which the board hangs. The dart leaves your hand with a horizontal velocity at a point 1.94 m above the ground. The dart strikes the board at a