B)
9.8.
C)
between 0 and 9.8.
D)
greater than 9.8.
Answer
:
B
DiF: 2
Topic: Newton's 2nd Law
52)
A block is dragged without acceleration in a straight

line path across a level surface by a force of 6 N.
What is the force of friction between the block and the surface?
A)
less than 6 N
B)
more than 6 N
C)
6 N
D)
need more information to say
Answer
:
C
DiF: 2
Topic: Newton's 2nd Law
53)
Suppose a particle is being accelerated through space by a 10

N force. Suddenly the particle encounters
a second force of 10 N in the opposite direction from the ±rst force. The particle with both forces acting
on it
A)
is brought to a rapid halt.
B)
decelerates gradually to a halt.
C)
continues at the speed it had when it encountered the second force.
D)
theoretically tends to accelerate toward the speed of light.
E)
none of these
Answer
:
C
DiF: 2
Topic: Newton's 2nd Law
54)
A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. What is the jet's
acceleration in meters per second per second when taking oF?
A)
0.25
B)
1
C)
2
D)
4
E)
none of these
Answer
:
C
DiF: 2
Topic: Newton's 2nd Law
55)
A 1

kg rock that weighs 9.8 N is thrown straight upward at 20 m/s. Neglecting air resistance, the net
force that acts on it when it is half way to the top of its path is
A)
less than 9.8 N.
B)
9.8 N.
C)
more than 9.8 N.
Answer
:
B
DiF: 2
Topic: Newton's 2nd Law
56)
A 1

kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force that acts on the
stone when it is halfway to the top of its path is about
A)
1/2 N.
B)
1 N.
C)
5 N.
D)
7.5 N.
E)
10 N.
Answer
:
E
Dif: 3
Topic: Newton's 2nd Law
57)
The brakes oF a speeding truck are slammed on and it skids to a stop. IF the truck were heavily loaded so
that it had twice the total mass, the skidding distance would be
A)
1/2 as Far.
B)
1 1/2 times as Far.
C)
2 times as Far.
D)
4 times as Far.
E)
the same.
Answer
:
E
Dif: 3
Topic: Newton's 2nd Law
58)
A skydiver oF mass 100 kg experiences air resistance oF 500 N, and an acceleration oF
A)
about 0.2 g.
B)
about 0.3 g.
C)
about 0.4 g.
D)
about 0.5 g.
E)
more than 0.5 g.
Answer
:
D
Dif: 3
Topic: Newton's 2nd Law
59)
An object released from rest on another planet requires one second to fall a distance of 6 meters. What is
the acceleration in meters per second per second due to gravity on this planet?
A)
3
B)
6
C)
12
D)
15
E)
none of these
Answer
:
C
DiF: 3
Topic: Newton's 2nd Law
60)
A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the
deceleration in meters per second per second of the car?
A)
110
B)
220
C)
800
D)
880
E)
can't be solved without the mass of the car
Answer
:
B
DiF: 3
Topic: Newton's 2nd Law
61)
A 10

kilogram block with an initial velocity of 10 m/s slides 10 meters across a horizontal surface and
comes to rest. It takes the block 2 seconds to stop. The stopping force acting on the block is about
A)
5 N.
B)
10 N.