The emphasis of the orange-and-apple sequence in your textbook is
A) defining systems.
B) actions equal reactions.
C) forces produce accelerations.
D) friction is a force.
E) mass is not a force.
Answer: A
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The Cassini division seen in Saturn's rings is the result of a gravitational interaction from one of its moons on Saturn's rings.
Answer the following statement true (T) or false (F)
A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x direction strikes and sticks to a 3.0-kg object moving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?
A. 2.4 J B. 9.6 J C. 5.4 J D. 0.6 J E. 6.0 J
When a fixed amount of ideal gas goes through an isochoric process
A) its internal (thermal) energy does not change. B) the gas does no work. C) no heat enters or leaves the gas. D) its temperature must increase. E) its pressure must increase.
A ball is projected upward at time t = 0 s, from a point on a flat roof 90 m above the ground. The ball rises and then falls with insignificant air resistance, missing the roof, and strikes the ground
The initial velocity of the ball is Consider all quantities as positive in the upward direction. The vertical velocity of the ball when it is above the ground is closest to A) -81 m/s. B) -64 m/s. C) -48 m/s. D) -32 m/s. E) -97 m/s.