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Question

If we know that a nonzero net force is acting on an object, which of the following must w
assume regarding the object's condition? The object is;
a. at rest.
b. moving with a constant velocity. c. being accelerated. d. losing, m
estions 2 and 3 refer to the situation and diagram described below.
A
B
Two spheres A &amp; B are projected off
edge of a 2.0 m high table with the sa
horizontal velocity. Sphere A has a
10. g and sphere B has a mass of 5 g
X
both spheres leave the edge of the table at the same instant, sphere A will land
a.
at some time before sphere B.
b.
at some time after sphere B.
C .
at the same time as sphere B.
There is not enough information to decide.
both spheres leave the edge of the table at the same instant, sphere A hits the floor at
ed X. Sphere B will hit the floor
at some point between the edge of the table and X.
at the same distance from the table as X
at some point past X.
There is not enough information to decide.
ruck is moving at constant speed. Inside the storage compartment, a rock is dropp
pint of the ceiling and strikes the floor below. The rock hits the floor
ahead of the midpoint of the ceiling.
exactly below the midpoint of the ceiling.
behind the midpoint of the ceiling.
7. Which of those forces act on the block if it does not move?
a. 1, 2, 3, and 4
b. 1, 2, 4, and 5
c. 1, 2, 3, and 5
d. 2, 3, 4 and 5.
8. Now, the student fills the bucket with water and the block starts to slide at a constant velocity.
Which forces are acting on the block now?
a. 1, 2, 3, and 4
b. 1, 2, 4, and 5
c. 1, 2, 3, and 5
d. 2, 3, 4 and 5.
9. The bucket is now fill with sand to the same label as water. The block will
a. moves at constant speed.
b. slows down gradually to a stop.
c. speeds up for a bit, then moves at constant speed.
d. accelerates constantly.
10. Eventually, the block reaches the edge of the table. After the block leaves the table, which of the
following forces act on the block?
a. the force of motion
b. a normal force
c. kinetic friction
d. the force of gravity
11. A 500 N desk is pull across a marble floor at a constant velocity by a 350 N force. What is the
coefficient of kinetic friction between the desk and the floor?
a. 0.3
b. 0.7
c. 1.43
d. 150

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Subject: Physics, Science

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