CH 6 PowerPoint Problems
1. A golf club strikes a 0.045-kg golf ball in order to launch it from the tee. For simplicity, assume
that the average net force applied to the ball acts parallel to the balls motion, has a magnitude
of 6800 N, and is in contact
CH 5 PowerPoint Problems
1. The model airplane in Figure 5.6 has a mass of 0.90 kg and moves at a constant speed on a
circle that is parallel to the ground. The path of the airplane and its guideline lie in the same
horizontal plane, because of the weight
CH 4 PowerPoint Problems
1. Two skaters, a man and a woman, are standing on ice. Neglect any friction between the
skate blades and the ice. The mass of the man is 81 kg, and the mass of the woman is 58 kg.
The woman pushes on the man with a force of 62 N
CH 7 PowerPoint Problems
1. Two identical automobiles have the same speed, one traveling east and one traveling west. Do
these cars have the same momentum?
I.
Do they have the same kinetic energy?
II.
Can a single object have kinetic energy but no momentu
Q. 5. REASONING According to Equation 2.2 xt
0
tx0 , the average velocity
(v)
v=
is equal to the displacement (x x
) divided by the elapsed time (t t ), and the
0
0
direction of the average velocity is the same as that of the displacement. The
displaceme
Physics Notes
Figure 9.21
The force
does work in rotating the wheel through the angle .
Definition of Rotational Work
The rotational work
angle is
done by a constant torque
in turning an object through an
KE=1/2MV^2
I=mr^2
Definition of Angular Momentum
T
Chapter 7
Impulse and Momentum
7.1 The Impulse-Momentum Theorem
There
are
many
situations when the force
on an object is not
constant
Collision time, tf - t0 is very short, but force
can be quite large
In comparison, the average force F is
smaller
Impulse