Question

Question 1

part 1

-Change in momentum is equal to what?

part 2

-The **Law of Conservation of Momentum** tells
us?

part 3

-Why is it important to know the **Center of Mass**
or “Center of Gravity” for an object?

part 4

-In physics, **angular displacement** (amount of
rotation) can be measure in either... (blank 1) or (blank 2)

Answer #1

Question 2
part 1
-Time rate of change in an angular displacement is called?
Hint:
part 2
-What are the two types of acceleration in a Rigid-Body
Rotation?
part 3
-What depends on a body’s mass and how the mass is
distributed?
part 4
-When the moment of inertia is very large, what
does this mean about the rotational kinetic energy
of a rigid body?
part 5
-Lever Arm or moment arm, Line of
Action are taken into consideration when...

Question 1: Mark True or False beside each
statement below:
_______(a) The center of mass (gravity) of any object must lie
on a point within or on the body of each
object.
_______(b) The torque due to a force is independent of
the choice of axis of rotation.
_______(c) If the forces on an object balance, then this object
cannot experience any rotation.
_______(d) If the torques on an object balance, then this object
cannot have angular acceleration.
_______(e) If...

The physics students wish to test the law of conservation of
angular momentum and decides to perform a completely inelastic
collision between two discs. They attach disc 1 (from part 1) to
the rotational sensor then give it a spin. After about 4 seconds,
they drop disc 2 on top of disc 1. The whole process takes only ~10
seconds total. The rotational sensor records the angle and velocity
of the setup every 0.05 s.
Question: Compare the rate of...

Which statement best describes the conservation of momentum?
1. When Newton's 3rd law applies to objects inside and outside
of the system because forces are causing acceleration.
2. When there are no unbalanced exerternal forces acting on the
system.
3.When the center of mass of the system moves in a circular
path.
4.When the center of mass of the system is not accelerating.

Questions (use complete sentences)
1) What is a conservation law? What is the basic approach taken
when using a conservation law?
2) Could the linear momentum of a turtle be greater than the
linear momentum of a horse? Explain.
3) Carts A and B stick together whenever they collide. The mass
of A is twice that of B. How could you roll the carts so that they
would be stopped after a collision?
4) How can a satellite’s speed decrease...

What does k in Hooke's law measure Question 2 options: a) The
mass b) The displacement distance c) How strong the spring is d)
The coefficient of friction

Concept - Conservation of Linear Momentum
Question:
a. The mass of car 1 is 275g. The velocity prior to hitting
another car is 1.1m/s. After colliding, the velocity of car 1 is
0.9 m/s. Find car 1's change in velocity (m/s). Find car 1's change
of moment (momentum) (kgm/s).
b. The mass of car 2 is 255g. The velocity prior to getting hit
by car 1 is 0 m/s. After it has collided with car 1, what is the
change...

1.The acceleration of an object is equal to
the rate of change of its position
the rate of change of its velocity
the rate of change of its speed only
the time an object has been in motion
2.
What two forms of energy does a rollercoaster transfer
between?
Applied force to gravitational force
Normal force to friction force
Air resistance force to tension force
Potential energy to kinetic energy
3.
What is the amount of matter an object contains?...

Step 1: Before the collision, the total momentum is pbefore =
mv0 + 0 where m is the ball’s mass and v0 is the ball’s speed. The
pendulum is not moving so its contribution to the total momentum is
zero. After the collision, the total momentum is pafter = (m + M)
V, where m is the ball’s mass, M is the pendulum mass, and V is the
velocity of the pendulum with the ball stuck inside (see the
picture...

QUESTION 1
Part 1
Engineers wish to launch a satellite from the surface of the
Moon. What is the minimum speed the satellite must have to escape
the Moon’s gravity – that is, what is the escape velocity at the
surface of the Moon? The Moon has a mass of 7.3x10^22 kg and a
radius of 1.7x10^6 m.
a.
1700 m/s
b.
5.7x10^6 m/s
c.
It depends on the mass of the satellite.
d.
2400 m/s
Part 2
The satellite...

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