A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0° above the horizontal at a location where g = 10.0 m/s2. What is the vertical component of its velocity when it is at the highest point of its trajectory?
A) 0 m/s
B) 10 m/s
C) 75.0 m/s
D) 130 m/s
E) 150 m/s
A
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Suppose that a ship is accelerating through space in such a way that the passengers are experiencing a constant force (due to the thrust of the ship) equivalent to the total weight of the ship and passengers on Earth
From the point of view of observers on Earth, how does the ship accelerate? A) It has a constant acceleration of 9.8 m/s2, therefore increasing its speed by 9.8 m/s with each passing second. B) At first, it has a nearly constant acceleration of 9.8 m/ s2. But as it approaches the speed of light, its acceleration gradually slows in such a way that it never stops accelerating, but never reaches the speed of light either. C) At first, it has a very large acceleration—much larger than 9.8 m/s2. But when it reaches the speed of light it stops accelerating. D) It has a constant acceleration of 9.8 m/s2 until it reaches a speed of half the speed of light. Then its acceleration suddenly slows so that it can't go much faster.
A boat loaded with wood floats in a swimming pool. When the wood is thrown overboard, the pool level
A) rises. B) falls. C) remains unchanged.
Magnetic fields can deflect ______________ charges
Fill in the blank(s) with correct word
In the context of astronomy, _____ is the area visible in an image
A) the field of view B) the visible spectrum C) a reference field D) point of reference