A dart gun consists of a horizontal spring with k = 52 Newtons/m that is compressed 43
the gun is cocked. What is the initial acceleration of a 75-g dart when the gun is fired?

Explanation:

When a spring is compressed, the force exerted by the spring is given by:

where

k is the spring constant

x is the compression of the spring

In this problem we have:

k = 52 N/m is the spring constant

x = 43 cm = 0.43 m is the compression

Therefore, the force exerted by the spring on the dart is

Now we can apply Newton' second law of motion to calculate the acceleration of the dart:

where

F = 22.4 N is the force exerted on the dart by the spring

m = 75 g = 0.075 kg is the mass of the dart

a is its acceleration

Solving for a,

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

1 a

2 b

3 b

4 d

5 d

6 d

explanation: