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Work is calculated by getting the product of
force
and
displacement
. Which of the following is used in expressing work?
kg.m/s
2
0%
kg.m
2
/s
2
100%
kg.m
2
/s
3
0%
kg.m/s
0%
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A body
α
of mass
m
is being accelerated by a net force
F
. If the net force is reduced to one-half, what happens to the acceleration?
Increased four times
0%
Doubled
0%
Decreased to one-fourth
0%
Halved
100%
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A patient undergoing muscle therapy is asked to lift a set of dumbbells. The lifting work done by the hand on the dumbbells is _________.
A lost of potential energy
0%
A gain of both potential and kinetic energy
0%
A gain in potential energy
0%
A gain in kinetic energy
100%
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A child in a car holds a helium-filled balloon attached to a string. What happens to the balloon when the car accelerates forward?
Stays in its place
0%
Moves backward
0%
Accelerates upward
0%
Moves forward
100%
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A dog runs 10 meters east to catch a flying Frisbee and runs back taking the same path but stops 5 meters before reaching his master. What is the dog’s displacement?
5 m, east
0%
5 m, west
0%
10 m, east
0%
15 m, eastwest
0%
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Cheetah, the fastest land animal, could run with a maximum speed of 105 km/h. What is this in m/s? (1 km = 10
3
m; 1 h = 3600 s)
1750.00 m/s
0%
292.00 m/s
0%
29.17 m/s
0%
0.57 m/s
0%
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Which of the following pairs of displacements will give a resultant displacement of 4 kilometers?
2 km N & 4 km N
0%
2 km S & 4 km E
0%
10 km N & 6 km S
0%
5 km S &3 km W
0%
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Which of the following velocity vectors may be resolved by the equation,
0%
0%
100%
0%
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What is the correct name for the ionic compound Al
2
Se
3
?
aluminum selenide
0%
dialuminum triselenide
0%
aluminum(III) selenide
0%
aluminum triselenide
0%
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Knowing the fact that 1 L = 1000 mL and 1 mL = 1 cm
3
, how many cubic centimeters of water could you pour into a container whose capacity is 0.5 liter?
5 x 10
2
cm
3
100%
5 x 10
4
cm
3
0%
5
x 10
3
cm
3
0%
5 x 10 cm
3
0%
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Попередня
1
Більше сторінок
140004
140005
140006
140007
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Більше сторінок
149615
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