1.A toy gun can shoot 12.00-g plastic bullets at 6.00 m/s. (A) If the spring in

Question

1.A toy gun can shoot 12.00-g plastic bullets at 6.00 m/s. (A) If the spring in the gun can be compressed by 5.00 cm, what is its spring constant? (B) What compression should be if the speed of the bullet is to be increased to 7.00 m/s?

2.In an explosion, an object breaks down into two pieces, M1 and M2. M2 flies away at 3 times the speed of M1. (a) What is the mass ration of M1/M2? (b) Which mass has more momentum immediately after the explosion? Which mass has more kinetic energy? Please show your results in detailed calculations.

3.What is the kinetic energy of the Earth

Explanation / Answer

kA^2 /2 = mv^2 /2

k(0,05)^2 = 0.012 x 6^2

k = 172.8 N/m

so now 172.8x^2 = 0.012 x7^2

x =0.0583 m or 5.83 cm

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