1. What is true about all forces? a. They are unbalanced b. They involve more than one object c. They cause objects to moved. d. They cancel each other out

A rifle fires a 2.10 x 10^-2 kg pellet straight upward, because the pellet rests on a compressed spring when the trigger is is pulled. the spring has negligible mass and it is compressed by 9.10 x 10^-2 m from is unstrained length.

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An object that has kinetic energy must what?

A 4.5 kg box slides down a 4.3-m-high frictionless hill, starting from rest, across a 2.0-m-wide horizontal surface, then hits a horizontal spring with spring constant 510 N/m. The other end of the spring is anchored against a wall.

what is the acceleration of a car that slows down from 60m/s to 40 m/s during a period of 10 seconds?

Which of the following elements would you expect to be most reactive, based on the number of valence electrons it has? A. Magnesium (Mg) B. Sodium (Na) C. Aluminum (Al) D. Sulfur (S)

The earthquake killed about 60 people and was the strongest earthquake to hit

A sailor drops a wrench from the top of a sailboat's vertical mast while the boat is moving rapidly and steadily straight forward.

An eagle carries a fish up 50 m into the sky using 90 n of force. how much work did the eagle do on the fish

Consider a steel guitar string of initial length l=1.00m and cross-sectional area a=0.500mm2. the young's modulus of the steel is y=2.0*1011n/m2.