A 1200 Kg car pulls an 820 Kg trailer over a rough road. The force of friction acting on the trailer is 650 N.(backwards). Calculate the force that .... ....the car exerts on the trailer if a). The...
A 1200 Kg car pulls an 820 Kg trailer over a rough road. The force of friction acting on the trailer is 650 N.(backwards). Calculate the force that ....
....the car exerts on the trailer if
a). The trailer is moving at a constant velocity of 30 Km/h.
b). The trailer is moving forward at 60 Km/h and starts accelerating 1.2 m/s^2 (backwards).
- print Print
- list Cite
Expert Answers
calendarEducator since 2012
write1,657 answers
starTop subjects are Math, Science, and Social Sciences
We can use Newton's second law of motion for this.
Let;
F = Force that car exerts on trailer
F1 = friction force = 650N
For the first part since it is running with constant velocity there is no acceleration.
`F = ma` to trailer at the direction of cars' motion
`F-F1 = ma`
`F-650 = 820*0`
` F = 650 N`
So the car exerts 650N force on triler when it travels in constant speed.
Note:
For the second one you can use the same F = ma
Remember the acceleration is at the backward side or opposite direction of the direction of travel. So you need a negative sign to acceleration component.
Related Questions
- A 6000 kg helicopter is lifting a 1200 kg car with a cable. The helicopter is accelerating...
- 1 Educator Answer
- A car accelerates uniformly from rest to a speed of 21.0 km/h in 5.6 s. Find the distance the car...
- 1 Educator Answer
- One airplane travels due north at 300 km/h, while another travels due south at 300 km/h . Are...
- 1 Educator Answer
- A 1000-kg car traveling at 25 m/s runs into the rear of a stopped car that has a mass of 1500 kg...
- 1 Educator Answer
- Calculate value of the force and the tension in the coupling between the car and caravan in the...
- 1 Educator Answer
Unlock This Answer Now
Start your 48-hour free trial to unlock this answer and thousands more. Enjoy eNotes ad-free and cancel anytime.