A Spring-Powered Dart Gun Is Unstretched and Has a Spring

question 70

Multiple Choice

A spring-powered dart gun is unstretched and has a spring constant 10.0 N/m. The spring is compressed by 8.00 cm and a 5.00 gram projectile is placed in the gun. The kinetic energy of the projectile when it is shot from the gun is

• A) 0.020 J.
• B) 0.032 J.
• C) 0.060 J.
• D) 0.100 J.
• E) 0.120 J.

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Definitions:

Liver

A vital organ in vertebrates and some other animals that perform a wide range of functions including detoxification, protein synthesis, and production of biochemicals necessary for digestion.

Heart

Muscular organ whose contraction causes blood to circulate in the body of an animal.

Elastic

The ability of an object or material to resume its normal shape after being stretched or compressed, a characteristic of materials like rubber.

Oxytocin

Hormone, released by the posterior pituitary, that causes contraction of the uterus and milk letdown.