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Question
A 5.00-kg object is lifted from the floor to a shelf. The object's new gravitational potential energy relative to the floor is 102 J. What is the height of the shelf?Answer
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Related questions
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An indication of an object's inertia is given by its ______________.
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A change in motion requires a(n) ____________.
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The quantity mvr is an object's
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B) torque.
C) linear momentum.
D) angular momentum.
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A) 0.0 N
B) 6.1 N
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Q:
Newton's law of universal gravitation is believed to be applicable
A) to the Milky Way only.
B) on Earth and the Moon only.
C) throughout the universe.
D) to the solar system only.
E) on Earth only.
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In the equation A = B/C, the A and B are said to be _______________ proportional.
A) directly
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Newton's third law of motion states that the force pair acting on different objects consists of two forces that
A) are under the influence of gravity.
B) are equal and in the same direction.
C) always produce an acceleration.
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Q:
______________ principle explains why objects float or sink in a fluid.
A) Newton's
B) Pascal's
C) Bernoulli's
D) Archimedes'
Q:
The buoyant force of an object is equal to the ______________ of the ______________ it displaces.
A) mass; fluid
B) weight; fluid
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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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E) cannot be determined
Q:
A spacecraft in space keeps going at the same velocity, even without firing its rockets, in accordance with the _______________ law of motion.
A) fourth
B) first
C) second
D) third
Q:
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B) velocity.
C) displacement.
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E) distance.
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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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The straight-line distance and direction between two points are, together, called ______________.
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A projectile's vertical velocity component
A) changes most rapidly near the top of its trajectory.
B) changes at a constant rate.
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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.
C) constant and pointing in two directions.
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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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C) the object's acceleration increases by 9.8 m/s2each second.
D) the object travels 9.8 m each second.
Q:
An object with a mass of 8 kg is dropped and takes 5 s to hit the ground. Then another object with a mass of 16 kg is dropped from the same point. How long does it take to hit the ground?A) 5 sB) 10 sC) 3 sD) 25 sE) 125 s
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A freely falling object
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B) is unaffected by gravity.
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If an object moves with constant velocity,
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C) its average speed is constant.
D) its distance traveled per unit time is constant.
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Q:
An ant on a picnic table travels 30 cm eastward, then 15 cm northward, then 20 cm westward, and finally 15 cm southward. What is the magnitude of its net displacement?
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