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With a width of 49 m, the Sydney Harbour Bridge, in Australia, is the
worlds widest long-span bridge. Suppose two charges, 1 2.0 nC and
68.0 nC, are ced 49.0 m apart on the bridge. What is the elect
Ms. Todds Honors Physics
Name_
Newtons Second Law Problems
1. There are two forces on the 2.0-kg box shown below, but only one is shown. The
figure also shows the acceleration of the box. Find the sec
At-Tension
to Detail
TENSION is the name for the force in a stretched spring or string. (Or how
you would feel when you cant figure out a physics problem.)
In one of todays lab activities, you will ha
Mrs. Todds Honors Physics
Three ways to solve elastic collision problems
Elastic collision problems can be a pain to solve. Since there are often two unknowns,
v1f and v2f, then you need to have two e
Answer Key for acceleration problems:
Displacement with constant acceleration
1. 115 meters
4. 41.0 meters
5. 209 km/h
8. 1.30 x 103 meters
9. a) 132 seconds
b) 33.0 seconds
Velocity and displacement
Constant Acceleration Problems
1.
Spotting a deer up ahead, you brake your car from 75 km/h to 45 km/h over a
displacement of 88 m.
a.
What is the acceleration, assumed to be constant?
b.
What is the
A 10.0 kg crate is pulled up a rough incline with
an initial speed of 1.5 mIs. The pulling force is
100.0 N parallel to the incline, which makes an
angle of 15.0 degrees with the horizontal.
Assuming
SRTCH YOUR KWOWLE1G
1. Go to the website:
2. Set the softness for Spring 3 so that the spring constant is relatively
small. Using the available masses, find that spring constant. (How
can you take dat
I
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ENERGY WORKSHEET
Useg=9.8
.
2
rn/s
1. Pushy Pete applies a 100 N horizontal force to a 20 kg box 50.b m along a rough
floor with coefficient of friction 0.200 between the box and the floor. Calcu
Use the following vectors to answer items 15.
In the space below, construct a vector diagram showing the total initial
momentum just before the collision.
Consider a collision between two objects. Ass
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MIDTERM REVIEW
1. A system of two cables supports a 34.0 kg mass between two walls. The mass is
at rest (static equilibrium!). Refer to the diagram and the angles between the
vertical and
4. The inclined plane in the diagram has a coefficient of sliding friction of 0.3 00.
A 50.0 kg box is lifted to the top of the incline, then the box slides down to the
bottom of the incline.
a) ThePE
iTh1uiii&1iaJ
AQ = 1.94 X 1O C
A
2
1= l.80X 10
[xiO4s=OO]
Amtrak has plans to introduce a new electric train in 1999 that will run
between New York and Boston. It wont be superfast, Amtrak says, but i
Given:
1=?
P=32kW=3,2X10 4 W
R=8.oc2
In 1994, a group of students at Lawre
nce Technological University, in
Soutlifield, Michigan, built a car that combines conven
a
tional diesel en
gine and an elect
3
5. An airplane pilot is going to demonstrate flying in a tight vertical circle. To ensure that
she doesnt black out at the bottom of the circle, the acceleration must not exceed 4.0g.
If the speed o