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Physics 9 Chapter 3 - Dynamics - 14
1.
What is an arrangement of two objects of unequal masses called?
a) Gear system
b) Pulley
c) Atwood machine
d) Wheel and axle
2.
According to which law of motion, m
1
g - T = m
1
a?
a) Newton’s second law of motion
b) Newton’s third law of motion
c) Newton’s first law of motion
d) Newton’s fourth law of motion
3.
According to Newton’s second law of motion, m
1
g-T=..........?
a) T
2
b) m
2
a
c) m
1
g
d) m
1
a
4.
If the body B moves upwards and its weight m
2
g s less than the tension T in the string. Then, what will be the formula of Net Force?
a) Net Force acting on body B = (m
2
g - T) + m
2
g
b) Net Force acting on body B = T- m
2
g
c) Net Force acting on body B = m
2
g - T
d) Net Force acting on body B = (m
2
g + T) - m
2
g
5.
According to which law of motion, T- m
2
g = m
2
a?
a) Newton’s fourth law of motion
b) Newton’s first law of motion
c) Newton’s second law of motion
d) Newton’s third law of motion
6.
According to Newton’s second law of motion, T- m
2
g=..........?
a) M
2
a
b) T
2
c) M
1
a
d) m
1
g
7.
Which of the following machine can also be used to find the acceleration due to gravity?
a) Wheel and axle machine
b) Pulley machine
c) Atwood machine
d) Gear system
8.
Which of the following can be found by using an Atwood machine?
a) Current
b) Gravity
c) Voltage
d) Resistance
9.
What will be the formula of acceleration for vertical motion of two bodies attached to the ends of a string that passes over the frictionless pulley?
a) Formula: a = (m
1
+ m
2
) / (m
1
- m
2
)
b) Formula: a = (m
1
- m
2
)g / (m
1
+ m
2
)
c) Formula: a = (m
1
- m
2
) / (m
1
+ m
2
)
d) Formula: a = (m
1
+ m
2
)g / (m
1
- m
2
)
10.
With which both the objects are attached in an Atwood machine?
a) Rope
b) Pulley
c) Gears
d) String
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