Homework Help: Math/physics

Posted by Tom on Saturday, July 28, 2012 at 11:18am.

Known factors-weight 105 g---speed at start 60 mph---distance traveled 70 yds.
Questions
,what is the rate of decelleration?,
At what yard marker does it decellate to 35 mph
For each 5 feet higher from start - how much farther does it travel.

Thank you for your help,

Tom

Math/physics - Henry, Sunday, July 29, 2012 at 9:58pm
1h = 3600 s.
Vo=60mi/3600s * 1600m/mi = 26.7 m/s. = Initial velocity.

d = 70yd * 3Ft/yd * 1m/3.3Ft = 63.6 m =
Distance traveled.

V = 35mi/3600s * 1600m/mi = 15.6 m/s. =
Final velocity.

1. a = (V^2-Vo^2)/2d
a = (243.4-711.1) / 127.2 = -3.68 m/s^2.
The neg. sign means deceleration.

2. Yard Marker = Yo + 70yds When traveling North or East.

Yard Marker = Yo - 70yds When traveling
South or West.

Yo = Yard marker at starting point.

Answer this Question

Related Questions

Help...More Math Help!!!...Please! - A kayaker paddled 2 hours with a 6 mph ...
math - distance = rate x time or d = r*t car traveling 40 mi/hr goes 40 mi/hr x ...
Calculus - Two trucks start from the same point. One truck travels due east at a...
Physics - A 747 jetliner lands and begins to slow to a stop as it moves along ...
algebra - Jose traveled to San Diego at an average rate of 50 mph. Carlos made ...
Geometry - Use an indeirect proof to show that John exceeded the 55 MPH speed ...
math - Your Porsche's gas mileage (in miles per gallon) is given as a ...
physics - Suppose the roller coaster in Fig. 6-41 (h1 = 34 m, h2 = 10 m, h3 = 30...
physics - Two cars start from rest at the same location and at the same instant ...
Science - Physics - How long would it take you to drive from Houston to ...

For Further Reading

First Name:
School Subject:
Answer: