An object is being acted upon by three forces and moves with a constant velocity. One force is 60 N along the x-axis, the second is 75 N along the y-axis. What is the direction of the third force, measured counterclockwise from the x-axis?
A) 128°
B) 182°
C) 213°
D) 225°
E) 231°
E
Physics & Space Science
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A 30.0-kg child sits on one end of a long uniform beam with a mass 20.0 kg and a 40.0-kg child sits on the other end. The beam balances when a fulcrum is placed below the beam a distance 1.10 m from the 30.0-kg child. How long is the beam?
A) 2.12 m B) 1.98 m C) 1.93 m D) 2.07 m E) 2.20 m
Physics & Space Science
If both mass and velocity of a ball are doubled, the kinetic energy is increased by a factor of:
a. 16. c. 4. b. 8. d. 2.
Physics & Space Science
Changes in Earth's history are recorded
A) in the rock record. B) in magnetic tape at the bottom of the oceans. C) by rocks at the Library of Congress. D) Moon rocks.
Physics & Space Science
Answer the following statement(s) true (T) or false (F)
The earth’s equilibrium temperature depends on its radius
Physics & Space Science