Question

A tractor with a mass of 5400 kg has a drag force at the wheels of...

A tractor with a mass of 5400 kg has a drag force at the wheels of Fw = (400t^3  + 60) Newtons for the whole vehicle, where t is in seconds. The vehicle is initially traveling with a speed of 16 km/hr. It is then allowed to coast down, eventually coming to a stop. Use the principles of momentum and impulse to determine.

a) What is the tractor’s speed after 1 second?

b) What is the tractor’s speed after 4 seconds?

c) After how many seconds does it stop?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
After applying breaks to stop at a stop sign, a 1000 kg car (C) skids (wheels...
After applying breaks to stop at a stop sign, a 1000 kg car (C) skids (wheels are locked) along the straight flat road (R) for a halt. The car was initially traveling at 15 m/s and it was brought to a complete stop within 3 seconds. Assume, no air resistance. i. Using a force diagram and the definition of the work done, identify if each force does positive, negative, or zero work on the system of the “car and the...
The mass of a bicyclist and bike is 80 kg. The drag coefficient is 0.79. Frontal...
The mass of a bicyclist and bike is 80 kg. The drag coefficient is 0.79. Frontal area is 0.42 m^2. The density of air is 1.1 kg/m^3 at this elevation. The terminal velocity is reached when the drag force of a free falling object is equal to the weight. a)Estimate the magnitude of the terminal velocity of the cyclist after he has ridden his bike off of a cliff. Assume that the frontal area remains constant during the fall. b)Estimate...
Four people, each has a mass of 65kg, get in a car with a mass of...
Four people, each has a mass of 65kg, get in a car with a mass of 1700kg. 1) What impulse is required to accelerate the car from rest to a steady speed of 75 km/h on a flat road? Drag and friction can be ignored. 2) Assume the car hits a stationary 600kg moose. The car was still traveling at 75 km/h before the collision, and the collision is perfectly inelastic, what is the speed of the car+moose (in km/h)...
The driver of a one ton car traveling at 126 km/hr suddenly used his brake to...
The driver of a one ton car traveling at 126 km/hr suddenly used his brake to stop before hitting a stationary lorry ahead. After the brakes are applied, a constant kinetic friction force of magnitude 8 kilo Newton acts on the car. Ignore air resistance. (a) At what minimum distance should the brakes be applied to avoid a collision with the other vehicle? (b) If the distance between the vehicles is initially only 30.0 m, at what speed would the...
2.    A horizontal, 50 N force acts on a 5 kg mass, which is initially at...
2.    A horizontal, 50 N force acts on a 5 kg mass, which is initially at rest on a frictionless surface. After the mass has traveled 45 m, find the following: (25 points)        Given: (1 point)        a. the work done by the force. (4 points)        b. the change in kinetic energy. (4 points)        c. speed of the mass after 45 m. (4 points)        d. the change in momentum of the mass. (4 points)        e....
1. A 5 kg mass is initially traveling forwards at 10 m/s. It collides with a...
1. A 5 kg mass is initially traveling forwards at 10 m/s. It collides with a wall and rebounds with a speed of 5 m/s. What is the magnitude of the object's change in momentum? a) 5 kg m/s b) 25 kg m/s c) 50 kg m/s d) 75 kg m/s 2. Compare punching a wall to punching a bed. It takes more time for your hand to come to rest when punching a bed than when punching a wall....
A large tractor-trailer of total mass M = 10 metric tons (10,000 kg) is traveling down...
A large tractor-trailer of total mass M = 10 metric tons (10,000 kg) is traveling down I-70 in Colorado, coming down from the Rocky Mountains into Denver. A segment of this road that is 25 kilometers long descends a total of 1000 meters. Suppose that the truck driver wants to drive at a constant speed of v = 50 km/hr. (a) What is the work done on the truck by its brakes during this motion? (Give both the sign and...
A BMW of mass 2000 kg is traveling at 42 m/s. It approaches a 1000 kg...
A BMW of mass 2000 kg is traveling at 42 m/s. It approaches a 1000 kg Volkswagen going 25 m/s in the same direction and strikes it in the rear. Neither driver applies the brakes. Ignore the relatively small force on the cars due to the road and due to air resistance. (a) If the collision slows the BMW down to 33 m/s, what is the speed of the VW after the collision? (b) During the collision, which car exerts...
1. An engineer designing a roadside barrier seeks to reduce the force experienced by the occupants...
1. An engineer designing a roadside barrier seeks to reduce the force experienced by the occupants of a vehicle hitting the barrier. She can do nothing to change the velocity at impact or the mass of the occupants or the characteristics of a vehicle hitting the barrier. The only thing she can change is the depth of the barrier to increase the time of deceleration. This is because _________ remains constant during the crash. a.Acceleration b.displacement c. Force d. Impulse...
7. A 500 kg car goes around turn in the road that has a radius of...
7. A 500 kg car goes around turn in the road that has a radius of curvature of 5 m. The car is traveling at a constant speed of 10 m/s. (i) What is the centripetal force required to keep the car from sliding out as it goes around the turn? (ii) What must be the coefficient of friction between the tires of the car and the road in order for the car to not sliding as it goes around...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT