2 Problems i need hlep with, Acceleation and Time

  • Thread starter Maury_702
  • Start date
  • #1
2
0
1. ok so i have my physics packet and i need help bad. the problem is...
How long does it take a car to cross a 45m wide intersction after the light turns green if it accelerates from rest to constant 14.3 m/sec^2
Find T

and

A Car accelerates along a straight road from rest to 495 km/h in 16 sec. what is the magnitude of its average acceleration
Find a= ? km per hour/ sec
Find a= ? m/s^2




2.i don't have much equations for this problem in any of my notes
 

Answers and Replies

  • #2
192
0
1. ok so i have my physics packet and i need help bad. the problem is...
How long does it take a car to cross a 45m wide intersction after the light turns green if it accelerates from rest to constant 14.3 m/sec^2
Find T

and

A Car accelerates along a straight road from rest to 495 km/h in 16 sec. what is the magnitude of its average acceleration
Find a= ? km per hour/ sec
Find a= ? m/s^2




2.i don't have much equations for this problem in any of my notes
Do you the two velocity and position kinematic equations?

Xf=Xi+Vi*t+(a*t2)/2

Vf=Vi+a*t

Xf=final position
Xi=initial position
Vf=final velocity
Vi=initial velocity
t=time
a=acceleration
 
  • #3
2
0
i do have the 2nd one but i dont see how they can help me
 
  • #4
192
0
Try and use the first equation for your first problem.
You dont need more then that
 
Last edited:

Related Threads on 2 Problems i need hlep with, Acceleation and Time

Replies
1
Views
1K
Replies
6
Views
2K
Replies
5
Views
6K
Replies
1
Views
1K
  • Last Post
Replies
5
Views
5K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
11
Views
4K
  • Last Post
Replies
1
Views
3K
Replies
7
Views
1K
  • Last Post
Replies
8
Views
5K
Top