A.) Calculate the recoil velocity of a 1. kg plunger that directly interacts with a .02kg bullet fired at 600 meters/second

B.) If this part were to be stopped over 20.Cm, what would the ForceAvg. be on the gun?

A) -12 m/s

B) -360 N

Explanation:

A)

We can solve this problem by using the law of conservation of momentum: in fact, the total momentum of the plunger + bullet system must be conserved.

Initially, their total momentum is zero, since they are at rest:

While the final total momentum is

where:

m = 0.02 kg is the mass of the bullet

v = 600 m/s is the velocity of the bullet

M = 1 kg is the mass of the plunger

V is the recoil velocity of the plunger

Since momentum is conserved,

And so we find V:

B)

From part A), we said that the speed of the plunger after the shot is

u = 12 m/s

In order to be stopped, its final velocity must be

v = 0

Since its an accelerated motion, we can find its acceleration using the suvat equation

where

s = 20 cm = 0.20 m is the stopping distance

Solving for the acceleration, we find

And since the mass of the plunger is

m = 1 kg

The force on it would be (Newton's second law)

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length