# Help with mechanicsWatch

Announcements
#1
hello,
Can someone help me with this question: A car is traveling at on a horizontal straight road at 12m/s when the brakes are applied. locking all four wheels. The coefficient between the wheels and the road is 0.8. Find the distance traveled by the car before it stops.Thank You
0
5 years ago
#2
(Original post by npnguyen94)
hello,
Can someone help me with this question: A car is traveling at on a horizontal straight road at 12m/s when the brakes are applied. locking all four wheels. The coefficient between the wheels and the road is 0.8. Find the distance traveled by the car before it stops.Thank You
What's the problem you're having?

If it's the lack of mass, call it "m" and proceed as usual. It will cancel out.
0
5 years ago
#3
(Original post by npnguyen94)
hello,
Can someone help me with this question: A car is traveling at on a horizontal straight road at 12m/s when the brakes are applied. locking all four wheels. The coefficient between the wheels and the road is 0.8. Find the distance traveled by the car before it stops.Thank You
Draw a diagram, what forces are acting?
Use Newton's second law to find the (negative) acceleration
Use suvat to find the distance.
0
5 years ago
#4
Sorry for hijaking your thread (didn't want to make a new one!)

But in M2, my book says that the greatest displacement of a particle occurs when it's velocity is zero. I get this if its straight up and down, but this is along a line????
0
5 years ago
#5
(Original post by physicso)
Sorry for hijaking your thread (didn't want to make a new one!)

But in M2, my book says that the greatest displacement of a particle occurs when it's velocity is zero. I get this if its straight up and down, but this is along a line????
It probably means that if you're travelling along a horizontal line, when you come to a stop (after travelling) you will be at greatest displacement from the starting point.

Eg. you roll a bal along the floor, when it comes to a stop it's at it's farthest distance from you.
0
#6
(Original post by brianeverit)
Draw a diagram, what forces are acting?
Use Newton's second law to find the (negative) acceleration
Use suvat to find the distance.
thank you
0
X

new posts
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• Arts University Bournemouth
Art and Design Foundation Diploma Further education
Sat, 25 May '19
• SOAS University of London
Wed, 29 May '19
• University of Exeter
Thu, 30 May '19

### Poll

Join the discussion

#### How did your AQA GCSE Physics Paper 1 go?

Loved the paper - Feeling positive (185)
29.98%
The paper was reasonable (250)
40.52%
Not feeling great about that exam... (108)
17.5%
It was TERRIBLE (74)
11.99%