Question

A 5% grade with a length of 3,000 ft is meeting a 2% grade with a...

A 5% grade with a length of 3,000 ft is meeting a 2% grade with a length of 4,000 ft. If a truck starts at the beginning of the first grade at a speed of 50 mph, determine the following:

  1. Speed at the end of the first grade
  2. Speed at the end of the second grade

Homework Answers

Answer #1

The slope is positive so , the road is uphill , the decrease in speed on the 5% grade road of length 3000 ft is

= Distance × Slope × Speed

= 3000 ft ×( 5/100) × 50 mph

= 0.57 × 0.05 × 50 = 1.425 mph

So,

  • Speed at the end of first grade is 50-1.425 = 48.575 mph

For the second part, where the length of the road is 4000ft and the slope is 2%

The decrease in speed = Distance × Slope ×Speed

= 4000ft ×( 2/100) × 48.575

=0.76 × 0.02 × 48.575 = 0.74mph

So,

  • Speed at the end of second grade

=48.575 - 0.74 = 47.835mph

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A 5% grade with a length of 3,000 ft is meeting a 2% grade with a...
A 5% grade with a length of 3,000 ft is meeting a 2% grade with a length of 4,000 ft. If a truck starts at the beginning of the first grade at a speed of 50 mph, determine the following: Speed at the end of the first grade Speed at the end of the second grade
A baseball diamond is a square with sides of length 90 ft. A batter hits the...
A baseball diamond is a square with sides of length 90 ft. A batter hits the ball and runs toward first base with a speed of 22 ft/s. At what rate is his distance from second base changing when he is halfway to first base? At what rate is his distance from third base changing at the same moment?
The length, width, and height of a box are measured as 6 ft, 5 ft, and...
The length, width, and height of a box are measured as 6 ft, 5 ft, and 3 ft, respectively, with an error in measurement of at most 2/10 ft in each. Use differentials to estimate the maximum error (in feet) in the calculated volume of the box. *fraction form (exact asnwer) please, no decimals*
The cord AB has a length of 5 ft and is attached to the end B...
The cord AB has a length of 5 ft and is attached to the end B of the spring having a stiffness k = 10 lb/ft. The other end of the spring is attached to a roller C so that the spring remains horizontal as it stretches. If a 10-lb weight is suspended from B, use the free-body diagram for the ring at B to determine the necessary unstretched length of the spring, so that θ = 40◦ for equilibrium....
a cone with a radius of 5 ft and height 8 ft is leaking 2 cubic...
a cone with a radius of 5 ft and height 8 ft is leaking 2 cubic feet of water per second how fast is the radius of the surface of the water decreasing when the depth of the water is 4 ft
1.What zone for flexure is a W14x22 member with an unbraced length of 15 ft? 2....
1.What zone for flexure is a W14x22 member with an unbraced length of 15 ft? 2. Using the equations from Part 16 Chapter G, what is the shear capacity of a W8x13 member with Fy = 50 ksi?
Width (ft) Area (sq ft) 5 375.0 10 700.0 20 1200.0 30 1500.0 40 1600.0 50...
Width (ft) Area (sq ft) 5 375.0 10 700.0 20 1200.0 30 1500.0 40 1600.0 50 1500.0 60 1200.0 70 700.0 80 0.0 A homeowner is planning to fence in a play area for his dog. He has 160 feet of fencing. He will make a rectangular play area 1. If the play area is 5 feet wide, how long would it be?375 ft 2. What is the length of the play area if it is 50 feet wide? 3....
Determine the minimum length of a crest vertical curve if the grades are (+4%) and (-2%)....
Determine the minimum length of a crest vertical curve if the grades are (+4%) and (-2%). Assume design speed is 70 mi/h, a =11.2 ft /sec2, perception-reaction time = 2.5 sec
A ball is thrown vertically upward from a height of 5 ft with an initial velocity...
A ball is thrown vertically upward from a height of 5 ft with an initial velocity of 83 ft/s. The distance s (in feet) of the ball from the ground after t seconds is s = s(t) = 5 + 83t − 16t^2. (a) What is the velocity v, in feet per second, of the ball after 2 seconds? (b) When, in seconds, will the ball reach its maximum height? (Round your answer to one decimal place.) (c) What is...
5. COMPUTE DIRECT MATERIALS USED BASED ON THE FOLLOWING: BEG RM=$1,000 BEG WIP=$2,000 BEG FG=$3,000 END...
5. COMPUTE DIRECT MATERIALS USED BASED ON THE FOLLOWING: BEG RM=$1,000 BEG WIP=$2,000 BEG FG=$3,000 END RM=$4,000 END WIP=$5,000 END FG=$6,000 RM PURCHASED=$7,000 6. COMPUTE COST OF GOODS MANUFACTURED BASED ON THE FOLLOWING: DL=8,000 BEG WIP=2,000 BEG FG=3,000 MO=9,000 END WIP=5,000 END FG=6,000 DM USED =7,000
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT