PSC 1010 Exam 1 Questions & Answers 2024/2025
The use of inclined planes for Galileo's experiments helped him to
A.eliminate the acceleration of free fall.
B.discover the concept of energy.
C.discover the property called inertia.
D.discover the concept of momentum. - ANSWERSc. discover the...
The use of inclined planes for Galileo's experiments helped him to
A.eliminate the acceleration of free fall.
B.discover the concept of energy.
C.discover the property called inertia.
D.discover the concept of momentum. - ANSWERSc. discover the property called inertia
-note that inertia is a property of matter, not a reason for the behavior of matter
The concept of inertia mostly involves
A.mass.
B.weight.
C.volume.
D.density. - ANSWERSmass
When the string is pulled down slowly, the top string breaks, which best illustrates the
A.weight of the ball.
B.mass of the ball.
C.volume of the ball.
density of the ball. - ANSWERSweight of the ball
- Tension in the top string is the pulling tension plus the weight of the ball, both of which break the top
string.
When the string is pulled down quickly, the bottom string breaks, which best illustrates the
A.weight of the ball.
B.mass of the ball.
,C.volume of the ball.
D.density of the ball. - ANSWERSb. mass of the ball
The density of 1 kilogram of iron is
A.less on the Moon.
B.the same on the Moon.
C.greater on the Moon.
D.All of the above. - ANSWERSthe same on the moon
A cart is pushed to the right with a force of 15 N while being pulled to the left with a force of 20 N. The
net force on the cart is
A.5 N to the left.
B.5 N to the right.
C.25 N to the left.
D.25 N to the right. - ANSWERS5N to the left
The equilibrium rule, ΣF = 0, applies to
A.vector quantities.
B.scalar quantities.
C.Both of the above.
D.Neither of the above. - ANSWERSvector quantities
A bowling ball is in equilibrium when it
A.is at rest.
B.moves steadily in a straight-line path.
C.Both of the above.
None of the above. - ANSWERSboth of the above
, When you stand on two bathroom scales, with one foot on each scale and weight evenly distributed,
each scale will read
A.your weight.
B.half your weight.
C.zero.
D.actually more than your weight. - ANSWERShalf your weight
The force of friction can occur
A.with sliding objects.
B.in water.
C.in air.
D.All of the above. - ANSWERSall of the above
When Nellie pushes a crate across a factory floor at constant speed, the force of friction between the
crate and the floor is
A.less than Nellie's push.
B.equal to Nellie's push.
C.equal and opposite to Nellie's push.
D.more than Nellie's push. - ANSWERSequal and opposite to Nellie's push
When Nellie pushes a crate across a factory floor at an increasing speed, the amount of friction between
the crate and the floor is
A.less than Nellie's push.
B.equal to Nellie's push.
C.equal and opposite to Nellie's push.
D.more than Nellie's push. - ANSWERSless than Nellie's push
A hungry bee sees a flower in a 5-m/s breeze. How fast and in what direction should the bee fly in order
to hover above the flower?
A.It should fly toward the flower, then at 5 m/s into the breeze.
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