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Question
An acceleration may result fromA) a change in speed.
B) a change in direction.
C) a change in both speed and direction.
D) all of these
Answer
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Related questions
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A change in motion requires a(n) ____________.
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A) 0.0 N
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B) on Earth and the Moon only.
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E) on Earth only.
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In the equation A = B/C, the A and B are said to be _______________ proportional.
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Newton's third law of motion states that the force pair acting on different objects consists of two forces that
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B) are equal and in the same direction.
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______________ principle explains why objects float or sink in a fluid.
A) Newton's
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C) Bernoulli's
D) Archimedes'
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The buoyant force of an object is equal to the ______________ of the ______________ it displaces.
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If an object of mass 8 kg has an acceleration of 5 m/s2, what is the unbalanced force acting on it?
A) 40 N
B) 1.6 N
C) 0.63 N
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Q:
A spacecraft in space keeps going at the same velocity, even without firing its rockets, in accordance with the _______________ law of motion.
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Q:
A constant net force acting on an object that is free to move will produce a constant
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B) velocity.
C) displacement.
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A mass is accelerated when ______________ acts upon the mass.
A) a balanced force
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C) no force
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If an object has a constant velocity, then its acceleration is ______________.
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The straight-line distance and direction between two points are, together, called ______________.
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A projectile's vertical velocity component
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Q:
The magnitude of the acceleration of an object moving in a circle at constant speed is
A) inversely proportional to the speed squared.
B) inversely proportional to the speed.
C) inversely proportional to the radius of the circle squared.
D) inversely proportional to the radius of the circle.
Q:
The direction of the acceleration of an object moving in a circle at constant speed is
A) changing, but pointing in a predictable direction.
B) constant and pointing in only one direction.
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Q:
An object travels in a circle of radius 10.0 m with a constant speed of 3.0 m/s. What is the direction of its acceleration?
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B) Normal to the plane of the circle
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A freely falling object
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A ball is thrown up in the air with an initial velocity of 78.4 m/s upward. How long does it take the ball
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b. to come down after reaching maximum height?