Molecules which are having _______ are microwave active.
Dipole moment
High pressure Detector
Principle axis
Acidity
Q.3.
Which is the wrong relation from the following?
τ = I α
F = ma
L = I ω
I = τ α
Q.4.
The easiest way to open a heavy door is by applying the force
Near the hinges
In the middle of the door
At the edge of the door far from the hinges
At the top of the door
Q.5.
Three homogeneous ridged bodies -- a solid shere, a solid cylinder, and a hollow cylinder -- are placed at the top of an incline. If all are released from rest at the same elevation and rolls without slipping, which reaches the bottom first?
The solid sphere.
The solid cylinder.
The hollow cylinder.
They will all arrive at the same time.
Q.6.
Suppose you are designing an engineless car for a downhill coasting race. What type of wheels would be the best?
Solid disks.
Hoops.
Hollow cylinders.
Diamond encrusted triangles.
Q.7.
rev/min is equivalent to which of the following?
2600 rad/s
43.3 rad/s
273 rad/s
60 rad/s
Q.8.
The drive chain in a bicycle is applying a torque of 0.N ∙ m to the wheel of the bicycle. You can treat the wheel as a thin uniform hoop (or ring) with a mass of 0.kg and a radius of 33.0 cm. What is the angular acceleration of the wheel?
10.4 rad/s2
3.43 rad/s2
5.20 rad/s2
1.06 rad/s2
Q.9.
A merry-go-round spins freely when Diego moves quickly to the center along a radius of the merry-go-round. As he does this, it is true to say that
the moment of inertia of the system increases and the angular speed increases.
the moment of inertia of the system decreases and the angular speed remains the same.
the moment of inertia of the system decreases and the angular speed decreases.
the moment of inertia of the system decreases and the angular speed increases.
Q.10.
A uniform solid cylinder with a radius ofcm and a mass of 3.0 kg is rotating about its center with an angular speed of 33.4 rpm. What is its kinetic energy?
0.092 J
17 J
1.1 J
0.18 J
Q.11.
Is torque independent of the location of the origin?
Yes, always.
Yes, as long as the origin is either in the center or on one end.
No, you always need to specify the origin.
All of above
Q.12.
The rotational inertia of an object is greater when most of the mass is located
away from the axis (center)
near the center
on the rotational axis ( center)
None of these
Q.13.
Which object listed below has the greatest momentum?
A 0.05 kg object rolling at 0.2 m/s.
A 0.15 kg object rolling at 2 m/s.
A 0.15 kg object rolling at 1 m/s
A 0.4 kg object rolling at 2 m/s.
Q.14.
What would happen to the length of one day if Earth's moment of inertia were to increase?
The day would be longer.
The day would be shorter.
The day would stay the same.
All of above
Q.15.
What is Newton's 3rd Law?
For every action there is an equal and opposite reaction.
Acceleration depends on two variables, the mass of the object and the amount of force.
Q.16.
A push or a pull is called a
Gravity
Force
Q.17.
Which would have the LEAST gravitational potential energy (GPE)?
A ball sitting on the ground
Moon viewed from the Earth
An airplane flying 30,000 feet above the ground
A rock sitting on top of Mt. Everest
Q.18.
A bowling ball has a mass of 7.kg, a moment of inertia of 0.kg·mand a radius of 0.m. If it rolls down the lane without slipping at an angular speed of 4.rad/s, what is its rotational kinetic energy?
0.280 J
0.448 J
0.896 J
11.2 J
Q.19.
Which equation defines rotational kinetic energy?
K=1/2mw2
k=1/2Iw2
k=1/2Iv2
k=1/2mv2
Q.20.
A 15-kg child is sitting on a playground teeter-totter, 1.5 m from the pivot. What is the magnitude of the minimum force, applied 0.m on the other side of the pivot, that is needed to make the child lift off the ground?
66 N
740 N
23 N
44 N
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