Application of Newton’s Laws of Motion
1
1.
The horizontal surface on which the objects slide is frictionless.
If
M
= 2.0 kg, the tension in string 1 is 12 N.
Determine
F
.
a.
25 N
b.
20 N
c.
30 N
d.
35 N
e.
40 N
2.
The horizontal surface on which the objects slide is frictionless.
If
F
= 12 N, what is the tension in string 1?
a.
35 N
b.
30 N
c.
40 N
d.
45 N
e.
25 N
3.
The surface of the inclined plane shown is frictionless.
If
F
= 30
N, what is the magnitude of the force exerted on the 3.0kg block
by the 2.0kg block?
a.
18 N
b.
27 N
c.
24 N
d.
21 N
e.
15 N
4.
If
P
= 6.0 N, what is the magnitude of the force exerted on block 1
by block 2?
a.
6.4 N
b.
5.6 N
c.
4.8 N
d.
7.2 N
e.
8.4 N
5.
If
F
= 5.0 N, what is the magnitude of the force exerted by block 2
on block 1?
a.
17 N
b.
19 N
c.
21 N
d.
23 N
e.
5.0 N
6.
An astronaut who weighs 800 N on the surface of the earth lifts
off from planet Zuton in a space ship.
The freefall acceleration
on Zuton is 3.0 m/s
2
(down).
At the moment of liftoff the
acceleration of the space ship is 0.50 m/s
2
(up).
What is the
magnitude of the force of the space ship on the astronaut?
a.
41 N
b. 0.29 kN
c. 0.24 kN
d.
0.20 kN
e. 0.37 kN
7.
The horizontal surface on which the objects slide is frictionless.
If
M
= 1.0 kg and the magnitude of the force of the small block on
the large block is 5.2 N, determine
F
.
a.
6.0 N
b.
9.0 N
c.
7.8 N
d.
4.8 N
e.
4.1 N
8.
The horizontal surface on which the objects slide is frictionless.
If
F
= 6.0 N and
M
= 1.0 kg, what is the magnitude of the force
exerted on the large block by the small block?
a.
7.7 N
b.
9.8 N
c.
9.1 N
d.
8.4 N
e.
6.5 N
9.
The horizontal surface on which the objects slide is frictionless.
If
F
= 4.0 N and
M
= 1.0 kg, what is the magnitude of the force of
the connecting string on the smaller block?
a.
4.1 N
b.
5.9 N
c.
5.0 N
d.
6.6 N
e.
7.2 N
10. A 6.0kg object is suspended by a vertical string from the ceiling
of an elevator which is accelerating upward at a rate of 1.8 m/s
2
.
Determine the tension in the string.
a. 11 N
b. 70 N
c. 48 N
d. 59 N
e. 62 N
11. An 8.0kg object rests on the floor of an elevator which is accelerating
downward at a rate of 1.3 m/s
2
.
What is the magnitude of the force
the object exerts on the floor of the elevator?
a.
59 N
b. 10 N
c. 89 N
d. 68 N
e. 78 N
12. A 70kg stunt artist rides in a rocket sled which slides along a flat
inclined surface.
At an instant when the sled's acceleration has a
horizontal component of 6.0 m/s
2
and a downward component of
2.8m/s
2
, what is the magnitude of the force on the rider by the sled?
a.
0.83 kN
b. 0.98 kN
c. 0.65 kN
d.0.68 kN
e. 0.72 kN
13. If
F
= 40 N and
M
= 1.5 kg, what is the tension in the connecting
string shown?
Assume that all surfaces are frictionless.
a.
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 Spring '09
 Physics, Friction, 5.0 kg, 4.0kg, Zuton, 2 1.4 m/s, 2 1.8 m/s

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