Asked by Elle
Two bullets have masses of 2.4 g and 5.2 g, respectively. Each is fired with a speed of 37.0 m/s.
a) What is the kinetic energy of the first
bullet?
b) What is the kinetic energy of the second bullet?
I initially used KE=1/2MV^2 and got 1642.8 J, but got it wrong. What is my mistake?
a) What is the kinetic energy of the first
bullet?
b) What is the kinetic energy of the second bullet?
I initially used KE=1/2MV^2 and got 1642.8 J, but got it wrong. What is my mistake?
Answers
Answered by
Henry
Mass is measurd in kg Not grams. S0 you
must convert to kg:
divide grams by 1000.
must convert to kg:
divide grams by 1000.
Answered by
Elle
I see! Thank you!
Answered by
Elle
Another quick question, what is the ratio
K2/K1 of their kinetic energies. Is, it just dividing the second bullet's KE to the first?
K2/K1 of their kinetic energies. Is, it just dividing the second bullet's KE to the first?
Answered by
Henry
The ratio of K2 to K1 = K2/K1.
The ratio of K1 to K2 = K1/K2.
The ratio of K1 to K2 = K1/K2.
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