- #1
thephysicsm
- 5
- 0
Hello all,
I am currently working at a problem that is (seems) simple at calculations but I am puzzled by the word problems.
The problems are:
1. A spring powered projectile launcher contains a spring with:
k=300 N/m
The spring is compressed by 15.0 cm.
a. How much energy is stored in the compressed spring?
My answer is: 1/2 kx^2, and the answer is about 3.375J
b. How fast would a 38 g projectile be traveling if it were shot by this projectile launcher?
my answer is 13.3278 m/s
So my question is: would using a lighter projectile provide more momentum or less? Prove the statement algebraically.
Second question is: a truck sinks lower when you load it and it bounces slowly when it is loaded than when it is empty. Explain these phenomena using formulas.
I am currently working at a problem that is (seems) simple at calculations but I am puzzled by the word problems.
The problems are:
1. A spring powered projectile launcher contains a spring with:
k=300 N/m
The spring is compressed by 15.0 cm.
a. How much energy is stored in the compressed spring?
My answer is: 1/2 kx^2, and the answer is about 3.375J
b. How fast would a 38 g projectile be traveling if it were shot by this projectile launcher?
my answer is 13.3278 m/s
So my question is: would using a lighter projectile provide more momentum or less? Prove the statement algebraically.
Second question is: a truck sinks lower when you load it and it bounces slowly when it is loaded than when it is empty. Explain these phenomena using formulas.