![sakinahunt](/avatars/17429.jpg)
sakinahunt
02.12.2019 •
Physics
A1400 kg car moving at 6.6 m/s is initially traveling north in the positive y direction.
after completing a 90° right-hand turn to the positive x direction in 4.9 s, the inattentive operator drives into a tree, which stops the car in 430 ms.
what is the magnitude of the impulse on the car :
(a) due to the turn and (b) due to the collision?
what is the magnitude of the average force that acts on the car (c) during the turn and (d) during the collision?
(e) what is the angle between the average force in (c) and the positive x direction?
Solved
Show answers
More tips
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- C Computers and Internet How to Learn to Type Fast?...
Answers on questions: Physics
- P Physics How were the coastal plains formed...
- P Physics By taking moments about point p,calculate the force...
- P Physics Which of the phrases should be revised to improve parallel structure in the following sentence? While the priceless jewel was on display, the museum increased security,...
- P Physics If there were no laws on earth what would you do...
- P Physics Which has more momentum, a 50,000kg train engine crawling along at 0.2 m/s, or a .005kg bullet traveling 400m/s?...
- P Physics Identify the main ideas write the sentence that describes how weight can be affected by location....
- P Physics A catapult of pole length 9r throws a watermelon from one end of a pole which rotates about an axis at the other end with angular speed w. A smaller catapult of pole length...
- B Business Alistair is the owner of a small business unit. he has set aside funds to finance the day-to-day activities of the business. he tries to use these funds judiciously and...
- B Biology What is the final product of the calvin cycle and what happens to it...
- M Mathematics Find jeff’s percent grade if he answered 35 questions correctly on a text that had 50 questions....
Ответ:
a) J = 13067 kg*m/s
b) J = 9240 kg*m/s
c) F = 2666.73 N
d) F = 21488.37 N
e) 135°
Explanation:
We know that the impulse could be calculated by:
J = ΔP
where ΔP is the change in the linear momentum:
ΔP =![P_f -P_i](/tpl/images/0399/6873/b22bc.png)
Also:
P = MV
Where M is the mass and V is the velocity.
so:
J=![MV_f-MV_i](/tpl/images/0399/6873/4ac7b.png)
where
is the final velocity and
is the inicial velocity
a)The impluse from turn is:
On the turn,
and
, the magnitude of the impulse on direction x and y are:
So, using pythagoras theorem the magnitude of the impulse is:
J =![\sqrt{9240^2+9240^2}](/tpl/images/0399/6873/d4683.png)
J = 13067 kg*m/s
b) The impluse from the collision is:
J = 0 - (1400)(6.6)
J = 9240 kg*m/s
c) Using the next equation:
FΔt = J
where F is the force, Δt is the time and J is the impulse.
Replacing J by the impulse due to the turn, Δt by 4.9s and solving for F we have that:
F = J / Δt
F = 13067 / 4.9 s
F = 2666.73 N
d) At the same way, replacing J by the impulse during the collision, Δt by 0.43s and solving for F we have that:
F = J / Δt
F = 9240 / 0.43
F = 21488.37 N
e) The force have the same direction than the impulse due to the turn, Then, if the impulse have a direction of -45°, the force have -45° or 135°
Ответ:
Hope this helps